Divisibility Rules 1 to 20

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  • Опубликовано: 24 ноя 2024

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  • @YenjiJem
    @YenjiJem  6 лет назад +83

    Video was suggested by RaGHAFazKa MuHaMMaD

  • @brocraftandknowledge1144
    @brocraftandknowledge1144 4 года назад +25

    Divisiblity of 17-
    -multiply the last number with 5
    -then subtract with remaining number
    -if the result is multiple of 17 and it may also negative or positive and 0
    For ex- 204,4×5=20, 20-20=0.zero
    187,7×5=35, 18-35=-17.negative
    765,5×5=25, 76-25=51.positive

    • @sourajitboral2382
      @sourajitboral2382 3 года назад +1

      Thanks a lot.

    • @kuroshite
      @kuroshite 3 года назад +4

      Yes, it is given wrong in the video.

    • @bijunaac795
      @bijunaac795 Год назад

      Plzzzzzz can you try it for 289 I cant get the answer

    • @ShahNawazShahNawaz-j4p
      @ShahNawazShahNawaz-j4p 8 месяцев назад

      Yes this also makes my mind confused😢

    • @Why553-k5b_1
      @Why553-k5b_1 2 месяца назад

      ​@@bijunaac795 it's divisible by 17

  • @JkC2217
    @JkC2217 6 лет назад +146

    Much better than what my school taught.

  • @daffa_fm4583
    @daffa_fm4583 5 лет назад +33

    21: follow rules for 7 and 3
    22: follow rules for 2 and 11
    24: follow rules for 8 and 3
    26: follow rules for 2 and 13
    28: follow rules for 4 and 7
    30: follow rules for 3 and 10 or 2 and 15
    33: follow rules for 3 and 11

    • @theeman2577
      @theeman2577 5 лет назад +7

      23: Multiply last digit by 7 then add to remaining digits. Resulting number must be a multiple of 23.
      25: Last 2 digits must end in 25, 50, 75, or 00

    • @aizennickoadante5572
      @aizennickoadante5572 4 года назад

      AAAAAAAAHAISNAJZWKJMKSKSM!SLMX DJDS NS

    • @dhamiji4588
      @dhamiji4588 4 года назад

      Ghxxuxykxykfsts you too baby and early on Friday night out the first time in a s and early on lutdulygdstsyfagksdyzydadysfsyfsoyrayayrayrararysiastwouet jlzfzyofsyftydyfsyxtcggi😍🤔😑😋😚😎😘😚😘😋😎😚😎😋😚😋😃😘

    • @AakashKumar-gl2fk
      @AakashKumar-gl2fk 4 года назад

      @Aiden Miller bro r u working on every primes divisibility rules

    • @30IYouTube
      @30IYouTube 4 года назад

      @Aiden Miller Could you give an example?

  • @5starrr.mariii__
    @5starrr.mariii__ 4 года назад +49

    this music makes me feel like a spy

  • @YYHoe
    @YYHoe 4 года назад +20

    Alternative rules for 4, 8 and 16:
    4: If after division by 2, the number is still even, the number is divisible by 4.
    8: If after division by 2 twice, the number is still even, the number is divisible by 8.
    16: If after division by 2 thrice, the number is still even, the number is divisible by 16.

    • @Henrique.tRo_Real
      @Henrique.tRo_Real 2 года назад

      32: If after division by 2 four times, the number is still even, the number is divisible by 32.
      64: If after division by 2 five times, the number is still even, the number is divisible by 64.
      128: If after division by 2 six times, the number is still even, the number is divisible by 128.
      And it goes on forever.

    • @NSUHardsign
      @NSUHardsign 2 года назад

      If this shows an example, in those tables- I'll give you an example, the table of 8 right? Must skip numbers that are multiplied by odds in the table of 4

    • @matiaspereira9382
      @matiaspereira9382 Год назад

      Here I have alternative rules for 4, 8 and 16:
      4: The 10s digit is even and the last digit is 0, 4 or 8, or the 10s digit is even and the last digit is 2 or 6
      8: The 100s digit is even and the last 2 digits are 00 or a multiple of 8, or the 100s digit is odd and the last 2 digits are the result of multiplying 4 by an odd number
      16: The 1,000s digit is even and the last 3 digits are 000 or a multiple of 16, or the 1,000s digit is odd and the last 2 digits are the result of multiplying 8 by an odd number

    • @iys1098
      @iys1098 3 месяца назад

      256: If after division by 2 seven times, the number is still even, the number is divisible by 256
      512: If after division by 2 eight times, the number is still even, the number is divisible by 512
      1024: If after division by 2 nine times, the number is still even, the number is divisible by 1024
      2048: If after division by 2 ten times, the number is still even, the number is divisible by 2048
      4096: If after division by 2 eleven times, the number is still even, the number is divisible by 4096...

  • @abdullafahar7051
    @abdullafahar7051 11 дней назад +1

    Amazing video. How fast, effective, and cool edits to make us understand. You really deserve much more for this video. Thank you

  • @marcusscience23
    @marcusscience23 Год назад +5

    Rather than list out all the numbers one by one, here are generalised rules, the positive integers split into 4 categories:
    Powers of 2 (2^n): check last n digits
    Powers of 5 (5^n): same as above
    Relatively prime with 10 (p): multiply last digit by 10^[-1] mod p (modular multiplicative inverse) and add remaining truncated digits
    (repeat as necessary)
    Other composites: apply rules of greatest factors belonging in each of the above categories (if present)

    • @HeXdagamingnmore
      @HeXdagamingnmore Год назад

      Ehh to hard

    • @myrasadalage
      @myrasadalage Год назад

      I didn't understood a thing from this comment i am already trying hard with maths and this bro just .....

  • @Akarshkumar09
    @Akarshkumar09 4 года назад +14

    the music beat is so good

  • @simrangupta5242
    @simrangupta5242 5 лет назад +30

    short and crisp. loved it and thank you for making such a wonderful video

  • @sourajitboral2382
    @sourajitboral2382 3 года назад +9

    Precise. Very helpful. Though there's a mistake in 17 divisibility rule, apart from that it's very time saving. Appreciate your hard work.

  • @LaGGSBD
    @LaGGSBD 6 лет назад +6

    For divisibilty rule of 7, you can also take out the last digit, multiply the remaining by 3 and then add the digit you removed to the result.

    • @toddbiesel4288
      @toddbiesel4288 6 лет назад

      LaGG335 SBD3 You mean multiply by five...

    • @LaGGSBD
      @LaGGSBD 6 лет назад +1

      No, i dont mean that. It should be this gonna edit it for that:
      315 ----> 31x3=93 ----> 93+5=98
      98 ----> 9x3=27 ----> 27+8=35 which is divisible by 7

    • @toddbiesel4288
      @toddbiesel4288 6 лет назад

      LaGG335 SBD3 9
      OK, you meant multiply the first part by three, which would seem to be harder than multiplying the last digit by five.

  • @tomgraham3612
    @tomgraham3612 4 года назад +14

    Trouble spelling the word "multiply" for segments covering 13, 17, and 19. And the "add" wording for the 17 segment should say, "subtract." Otherwise, a stunning video we love!

  • @YYHoe
    @YYHoe 5 лет назад +2

    For 4, 8 and 16, if ur lazy and don't wanna do long division, just see if can divide by 2 twice, thrice and four times respectively. Works.

  • @vaultboy3198
    @vaultboy3198 6 лет назад +77

    WARNING LONG DIVISION

  • @kanchanmishra7424
    @kanchanmishra7424 4 года назад +1

    Who else expected divisibility of 20 to be like " apply 4 &5 "

    • @ashtonplays2613
      @ashtonplays2613 4 года назад

      Well, that could be,
      1240 yes 4/5/
      1235 no 4X5/
      1232 no 4/5X

  • @darkskywithmoon17
    @darkskywithmoon17 3 года назад +2

    Thanks for your help wish you all good healthy

  • @Henrique.tRo_Real
    @Henrique.tRo_Real 2 года назад +1

    50: Last digits must be 50 or 00.
    60: Apply rules for 3 and 20.
    101: Multiply the last dight by 10 and subtract it from the remaining digits
    103: Multiply the last digit by 31 and add it to the remaining digits.
    104: Apply rules for 13 and 8.
    105: Apply rules for 21 and 5
    106: Apply rules for 53 and 2.
    125: Last three digits must be 125, 250, 375, 500, 625, 750, 875 or 000.
    151: Multiply the last digit by 15 and subtract it from the remaining digits.

    • @matiaspereira9382
      @matiaspereira9382 Год назад

      105: I admit for 105 I usually combinate the rules of 3, 5 and 7 and I don't use. It's kinda hard not to use the rules of 3 and 7

  • @sojabhai5883
    @sojabhai5883 4 года назад +4

    This video is very short...
    But with required knowledge

  • @zecuse
    @zecuse 2 года назад +1

    I would adjust the rules for the powers of 2 (only 4, 8, and 16 were shown in this video) so they check that power's place digit for even/odd, then do the check for the next power of 2 down with the lower digits. If odd, add that lower power of 2 to the lower digits before checking. When we reach 4, even should have 0, 4, or 8 in the ones place and odd should have 2 or 6. This avoids any long division and is extendable to all powers of 2.
    Is 10,848 divisible by 16? 0 is even so, is 848 divisible by 8? 8 is even so, is 48 divisible by 4? 4 is even so, we're left with 8 and yes, 10,848 is divisible by 16.
    Is 10,928 divisible by 16? 0 is even so, is 928 divisible by 8? 9 is odd so, is 28 + 4 = 32 divisible by 4? 3 is odd so, we're left with 2 and yes, 10,928 is divisible by 16.
    Is 125,518,848 divisible by 512 (2^9)? 1 is odd so, is 25,518,848 + 256 = 25,519,104 divisible by 256?
    2 is even so, is 5,519,104 divisible by 128?
    5 is odd so, is 519,104 + 64 = 519,168 divisible by 64?
    5 is odd so, is 19,168 + 32 = 19,200 divisible by 32?
    1 is odd so, is 9,200 + 16 = 9,216 divisible by 16?
    9 is odd so, is 216 + 8 = 232 divisible by 8?
    2 is even so, is 32 divisible by 4?
    3 is odd so, we're left with 2 and yes, 25,518,848 is divisible by 512!

  • @hetalbrahmbhatt5380
    @hetalbrahmbhatt5380 4 года назад +5

    Thanks bro , it helped me in my project!!

  • @FinnPlanetballs
    @FinnPlanetballs 28 дней назад

    alternate test for 4:
    1: remove all the digits except for the last two
    2: divide the last digit by 2
    3: add it with the first digit
    4: if the sum is even, the whole number is divisible by 4

  • @jacksonsay37
    @jacksonsay37 2 месяца назад

    Easier way to determine whether a number is a multiple of 4. If the tens digit is even, it’s only a multiple of 4 if the ones digit is 0, 4, or 8. If the tens digit is odd, it’s only a multiple of 4 if the ones digit is 2 or 6.

  • @geremygonzalessleepwalkerr2900
    @geremygonzalessleepwalkerr2900 4 года назад +8

    0:22
    11 is not divisible by 3.

  • @rahulgosavi492
    @rahulgosavi492 4 года назад +3

    🥰🥰🥰🥰😎😎fantastic, fabulous, amazing............👏👏👏👏

  • @rajeshkothari5866
    @rajeshkothari5866 8 месяцев назад

    It would be easier to divide any number by 13 by following the mentioned steps until a three digit number or two digit number comes 🎉🎉❤

  • @nandithar8564
    @nandithar8564 9 месяцев назад

    Tip for divisibility of 11 only can be used in a 3 digit number
    The middle digit should be the SUM of first and last digit
    For example 253 2+3=5, 253 is divisibile by 11

  • @felicity165
    @felicity165 6 лет назад +37

    Why does the 17 divisibility rule stating that it should be added, but in the example it was subtracted? Which should be done? Add or subtract?

    • @YenjiJem
      @YenjiJem  6 лет назад +17

      Sorry yeah, it was supposed to say subtract

    • @ChloekabanOfficial
      @ChloekabanOfficial 4 года назад

      @SHELDON PHAM Says the person who pressed Ctrl+C then Ctrl+V.

    • @ChloekabanOfficial
      @ChloekabanOfficial 4 года назад

      @SHELDON PHAM
      1. How to mind makes no sense.
      2. If you think someone is salty, make it literal. (jk)
      3. It's "Ctrl+C" and "Ctrl+V", not "C+Ctrl" and "V+Ctrl".
      4. Eat- NO!

    • @sumanlata4955
      @sumanlata4955 4 года назад +1

      Hey Felicity, l was also about to write a comment on that but I have to agree( and I do ) that this vedio proved to be very very very very very very very helpful for me.

    • @felicity165
      @felicity165 4 года назад +1

      @@sumanlata4955 oh, yah it was v helpful haha i was simply, genuinely confused because i wasn't familiar at all with rules above 10 xD

  • @martinluther2942
    @martinluther2942 4 года назад +3

    Nice video today I learnt all 1 to 10 divisibility rules

  • @travelsinchinese640
    @travelsinchinese640 2 года назад +1

    This makes it so much better I had no idea before... Thanks!!!!!😀

  • @emmazepeda7383
    @emmazepeda7383 2 года назад +2

    Rules from 101-200 (not completed)
    101: take the last digit, multiply it by 10 and subtract it from the remaining digits
    102: apply rules of 51 and 2
    103: take the last digit, multiply it by 31 and add it to the remaining digits
    104: apply rules of 13 and 8
    105: apply rules of 21 and 5
    106: apply rules of 53 and 2
    107:
    108:
    109: take the last digit, multiply it by 11 and add it to the remaining digits
    110: apply rules of 10 and 11
    111: take the last digit, multiply it by 11 and subtract it from the remaining digits
    112:
    113:
    114:
    115:
    116:
    117:
    118:
    119:
    120: apply rules of 10 and 12
    121: take the last digit, multiply it by 12 and subtract it from the remaining digits
    122: take the last digit, multiply it by 6 and subtract it from the remaining digits
    123:
    124:
    125: last three digits must be a multiple of 125 (125, 250, 375, 500, 625, 750, 875 and 000)
    126:
    127:
    128: last seven digits must be a multiple of 128
    129:
    130: apply rules of 10 and 13
    131:
    132: apply rules of 66 and 2
    133:
    134:
    135:
    136:
    137:
    138: apply rules of 23 and 6
    139:
    140: apply rules of 10 and 14
    141:
    142: apply rules of 71 and 2
    143:
    144: apply rules of 48 and 3
    145:
    146:
    147:
    148:
    149:
    150: apply rules of 10 and 15
    151:
    152:
    153:
    154: apply rules of 77 and 2
    155:
    159:
    160: apply rules of 10 and 16
    161:
    162:
    163:
    164: apply rules of 82 and 2
    165:
    166:
    167:
    168:
    169:
    170: apply rules of 10 and 17
    171:
    172: apply rules of 86 and 2
    173:
    174:
    175:
    176:
    177:
    178:
    179:
    180: apply rules of 10 and 18
    181: take the last digit, multiply it by 18 then subtract it from the remaining digits
    182:
    183:
    184:
    185: apply rules of 37 and 5
    186:
    187:
    188:
    189:
    190: apply rules of 10 and 19
    191: take the last digit, multiply it by 19 and subtract it from the remaining digits
    192:
    193:
    194:
    195:
    196: apply rules of 98 and 2
    197:
    198: apply rules of 33 and 6
    199:
    200: last three digits must be 200, 400, 600, 800 and 000
    BONUS: 0.5: last decimal digit must be .0 or .5

    • @emmazepeda7383
      @emmazepeda7383 2 года назад

      Please help me find the other Divisibility Rules.

    • @Henrique.tRo_Real
      @Henrique.tRo_Real 2 года назад

      104: Apply rules for 13 and 8.
      105: Apply rules for 21 and 5
      106: Apply rules for 53 and 2.
      109: Multiply the last digit by 11 and add it to the remaining digits.
      111: Multiply the last digit by 11 and subtract it from the remaining digits.
      121: Multiply the last digit by 12 and subtract it from the remaining digits.
      122: Multiply the last digit by 6 and subtract it from the remaining digits.
      131: Multiply the last digit by 13 and subtract it from the remaining digits.
      141: Multiply the last digit by 14 and subtract it from the remaining digits.
      151: Multiply the last digit by 15 and subtract it from the remaining digits.
      161: Multiply the last digit by 16 and subtract it from the remaining digits.
      162: Multiply the last digit by 8 and subtract it from the remaining digits.
      171: Multiply the last digit by 17 and subtract it from the remaining digits.
      181: Multiply the last digit by 18 and subtract it from the remaining digits.
      182: Multiply the last digit by 9 and subtract it from the remaining digits.
      191: Multiply the last digit by 19 and subtract it from the remaining digits.
      By the way, change the rule for 125, it's too vague. Instead, use "Last three digits must be 125, 250, 375, 500, 625, 750, 875 or 000"

    • @Henrique.tRo_Real
      @Henrique.tRo_Real 2 года назад

      @@emmazepeda7383 Use those I said

    • @emmazepeda7383
      @emmazepeda7383 2 года назад

      @@Henrique.tRo_Real ok

    • @WhitePikm1n
      @WhitePikm1n Год назад

      108: Apply rules for 2 and 54

  • @276З
    @276З Месяц назад +1

    Better way to divide by 8
    Divide by 2
    Again
    Then again
    If u can successfully do that without decimals, it’s divisible by 8
    (no shit really)

  • @sumansoni4358
    @sumansoni4358 4 года назад +7

    perfect video..Supab explain🙏

  • @_x.jeet.x_
    @_x.jeet.x_ 2 года назад +1

    Kid's after learning decimals:- All of that was a lie!?

  • @Idonthaveanyideaforthis
    @Idonthaveanyideaforthis 4 месяца назад

    I found one for 4:
    - Look if the last number is even
    - If the last number is 4, 8 or 0 and the penultimate number is a even number the number is divisible by 4
    - Instead If the last number is a 2 or a 6 and the penultimate number is odd the number is divisible by 4
    Examples:
    348 -> 34(8) even -> 3(4)8 even = 348 is divisible by 4
    176 -> 17(6) even -> 1(7)6 odd = 176 is divisible by 4
    414 -> 41(4) even -> 4(1)4 odd = 414 is NOT divisible by 4

  • @YYHoe
    @YYHoe 6 лет назад +1

    For 4, you can divide by 2 twice, 8 divide by 2 thrice, and 16 divide by 2 4 times

  • @thatguyinthecockpit7379
    @thatguyinthecockpit7379 4 года назад +2

    When your favorite RUclips becomes your favorite teacher

  • @TheCounter46
    @TheCounter46 Год назад

    10 factorial
    1 - 3628800 is a number, so it is divisible by 1
    2 - 3628800 362880 - 0 -> 362880 -> 36288 - 0x2 -> 36288 - 0 -> 36288 -> 3628 - 8x2 -> 3628 - 16 -> 3612 -> 361 - 2x2 -> 361 - 4 -> 357 -> 35 - 7x2 -> 35 - 14 -> 21. 21 is divisible by 7 so 3628800 is divisible by 7
    8 - 907200 / 2 = 453600, so 3628800 is divisible by 8
    9 - going back to 3, shows that the final number is 9, so 3628800 is divisible by 9
    10 - 3628800

  • @esthervolley2343
    @esthervolley2343 5 лет назад +12

    Awesome video... Smart, clear & time saving... Except for the mistake of divisibility rule 17.. ( it must be subtracted)

  • @beastgamerutkarsh5804
    @beastgamerutkarsh5804 4 года назад +2

    Good

  • @PabloManuelElFino
    @PabloManuelElFino 18 дней назад

    Best video for school whne youre at the lcm unit at maths

  • @newyorkandgaming6450
    @newyorkandgaming6450 2 года назад

    1: it’s anything
    25: rules with 5x5
    30:Last digit is a 0 and the rest is divisible by 3
    40:same explanation with 30
    50:ends in 00 or 50
    60:same thing with 30 and 40
    75:use 25 and 3 to help,If both visible then it’s visible by it
    100:Two zeros at the end
    150:15x anything,but with a 0
    200:same applies with 100,two zeros at end but with a twist.Third digit has to be even
    300:30 and 10 apply
    500:Ends in 500 or 000
    1000:Three zeros
    10000:Four zeros
    100000:Five zeros
    Million:six zeros
    And so on…….

    • @WhitePikm1n
      @WhitePikm1n Год назад

      21: Rules with 3 and 7
      22: Rules with 2 and 11
      23: 💀
      24: Rules with 2 and 12
      25: Ends in 25,50,75, or 00
      26: Rules with 2 and 13
      27: Rules with 3 and 9
      28: Rules with 2 and 14

    • @jayvierthedude
      @jayvierthedude Год назад

      70: Divisible by 7 and last digit is 0
      80: Divisible by 8 and last digit is 0
      90: Divisible by 9 and last digit is 0
      Heres a bonus:
      1250: Divisible by 2 and 625.

  • @richarddocot9299
    @richarddocot9299 4 года назад +2

    Thanks for this :)
    this is my dad's acc btw hehe..
    This really helped me :)
    I'm on Grade 5 now
    stay safe everyone😊

  • @thephysicistcuber175
    @thephysicistcuber175 Год назад

    For 7, 11, 13 make uae of the fact that 7*11*13=1001 to never have to deal with numbers above 1000. Example: 2639. Divide into groups of 3 and do the alternating sum, just like for 11. In this case you have to test 2-639=-637. Now you can check for divisibility by 7, 11 and 13 of this number. It's obviously divisible by 7, as 637=91*7 and 91 is divisible by 13, thus your original number is divisible by 7 and 13.

  • @creativekid473
    @creativekid473 Год назад

    For dividing 3 digit numbers by 11, subtract the second and last digits together.
    132; 3-2=1; two ones make eleven, so 132 is divisible by eleven
    The more you know

  • @aadyakvguna8507
    @aadyakvguna8507 10 месяцев назад +1

    Thank you for consuming our Time:)

  • @pupugunnu7579
    @pupugunnu7579 4 года назад +4

    Thanks it was really good 🙂

  • @hansikabagran4681
    @hansikabagran4681 5 месяцев назад +1

    Legend see this video for holiday homework

  • @Venni-teju
    @Venni-teju 6 месяцев назад

    Thank you very much for these divisibility rules

  • @runningfridge8318
    @runningfridge8318 6 лет назад +5

    Thank you, I needed this for math class.

  • @bleuennabriennedolar715
    @bleuennabriennedolar715 11 месяцев назад

    bro this video helped me this is better than my techer explaining i realize the divisibility rules are super easy thanks for your help! 😄

  • @LucidMlem
    @LucidMlem 2 года назад +1

    The guide in my classroom only went up to 10 and didn't show 7 but I bet no one asked for this comment

  • @tyrfr
    @tyrfr 3 года назад +1

    U are better than my teacher

  • @saitejasudharshan
    @saitejasudharshan 4 года назад +2

    The video is nice but the divsidibilty of seven should be subtracted

  • @AavyanTiwari
    @AavyanTiwari 12 дней назад

    1:12 Or,
    If the last 2 digits are divisible by 8,
    And the hundreds place is even.
    (Because 100 is not, but 200 is, 300 is not, 400 is, etc.)

  • @SachinSingh-du8pt
    @SachinSingh-du8pt 5 лет назад +1

    Nice tricks

  • @sevturner2685
    @sevturner2685 4 года назад +1

    0:46 or you can multiply 1's digit by 5 then add that to the remaining example: 123 is 12+(3x5)

  • @bibhrantakeshari3263
    @bibhrantakeshari3263 4 года назад +2

    Rule number 17 isn't apply for 51

  • @prashantchauhan5359
    @prashantchauhan5359 2 года назад

    Thanks man! it was helpful
    and your video making skills are really appreciating

  • @chrisrj9871
    @chrisrj9871 4 года назад +3

    2:22 - You said "Add" but I think meant "Subtract".. 7x5=35 MINUS 1 = 34, / 17 = 2.

  • @jimbbob7223
    @jimbbob7223 4 года назад +1

    This was really helpful thanq

  • @bobczech7774
    @bobczech7774 Год назад

    another way of saying something is divisible by 8
    So every 25 multiples is 200
    If the first 3 digits are in one of the 25 multiples + 8x(any number that is dividable by 25)
    So 272 is 8x(25+9)

  • @darjonmadrid2464
    @darjonmadrid2464 3 года назад +4

    This is a perfect video, specially when you don't have much time to study it

  • @lokanshsrivastav5902
    @lokanshsrivastav5902 3 года назад +1

    Really helped me.

  • @minthukha8022
    @minthukha8022 4 года назад +3

    Thank you so much!!

  • @quindexreal
    @quindexreal 5 лет назад +3

    can you do 20 - 40

  • @LaGGSBD
    @LaGGSBD 6 лет назад +16

    Did this channel just blow up with that paper video out of nowhere? How does that happen? How does one video blow up suddenly after 3 months of being uploaded? (Not commenting on that video because my comment wouldn't be seen)

    • @damirock98
      @damirock98 5 лет назад

      RUclips recommendation algorythm is a hell of a strange place...

  • @117lphuockhanh
    @117lphuockhanh 6 лет назад +6

    Divisible by 21:Repeat unusual-7 and 3
    Divisible by 22:Repeat unusual-11 and 2
    Divisible by 23:Every number digits is:
    2*(x*10)+3*x,x=random number
    24-26 will make it next sunday

    • @dali1415
      @dali1415 5 лет назад

      They never made it...

    • @ashtonplays2613
      @ashtonplays2613 4 года назад

      OK.

    • @ashtonplays2613
      @ashtonplays2613 4 года назад

      I can make 24 - 26 for you.
      24 - repeat unusual 3 and 8
      25 - last 2 numbers are divisible by 25
      26 - repeat unusual 2 and 13

    • @ashtonplays2613
      @ashtonplays2613 4 года назад

      I have more:
      27 - get last digit, multiply by 8, subtract the remaining, result must equal to a multiple of 27
      28 - repeat unusual 4 and 7
      30 - repeat unusual 3 and 10 or 2 and 15
      33 - repeat unusual 3 and 11
      34 - repeat unusual 2 and 17
      36 - repeat unusual 4 and 9
      37 - get last digit, multiply by 11, subtract the remaining, result must equal to a multiple of 37
      38 - repeat unusual 2 and 19
      40 - repeat unusual 4 and 10 or 5 and 8
      42 - repeat unusual 2 and 21
      44 - repeat unusual 4 and 11
      45 - repeat unusual 5 and 9
      46 - repeat unusual 2 and 23
      47 - take last digit, multiply by 14, subtract the remaining, result must equal to a multiple of 47
      50 - repeat unusual 2 and 25

    • @aizennickoadante5572
      @aizennickoadante5572 4 года назад

      @@ashtonplays2613 *u n u s u a l*

  • @simi487
    @simi487 5 месяцев назад +1

    8=if the last 3 digit is divisible by 8

  • @jyotishsahab1295
    @jyotishsahab1295 4 года назад +2

    Mst h yaar

  • @user-xl5vc1me6t
    @user-xl5vc1me6t 4 года назад +2

    The video is very fast i cant see properly

  • @noahgharacholou8905
    @noahgharacholou8905 4 года назад +8

    2:24 you said you add
    2:29 you subtracted

    • @ROMAN.OTC-1
      @ROMAN.OTC-1 3 года назад +1

      We have to subtract

    • @realmarker
      @realmarker 3 года назад

      No king (opposite of yes queen)

    • @noahgharacholou8905
      @noahgharacholou8905 3 года назад

      @@ROMAN.OTC-1 2:24 it says ADD. What does ADD spell?

    • @noahgharacholou8905
      @noahgharacholou8905 3 года назад

      @@ROMAN.OTC-1 I thought you were All In One. Why do you appear to be Roshan Empire?

  • @jackm8878
    @jackm8878 6 лет назад +2

    You don't need to do long division for rule 8. Just do 4.

  • @SMMAndrew2121
    @SMMAndrew2121 4 года назад +2

    Great video, very useful

  • @suntzucan
    @suntzucan 4 года назад +2

    I noted down every single one 😂😂😂

  • @ukwgrl3973
    @ukwgrl3973 4 года назад +2

    Nice teaching and nice examples

  • @palakagrawal1190
    @palakagrawal1190 4 года назад +5

    It is amazing It help me a lot
    I scored 70/70in my test
    Thanks for making this video
    But there is 17 divisibility is wrong
    So please correct it

  • @daffa_fm4583
    @daffa_fm4583 5 лет назад +2

    20 can be also like this:
    - 2nd last digit have to be a multiple of 2 or 0
    - Last digit have to be 0

  • @S9niaa
    @S9niaa 4 года назад +1

    Nice video mad knowledge too.💗💗💗💗💗

  • @brocraftandknowledge1144
    @brocraftandknowledge1144 4 года назад +2

    Nice video, very tricky

  • @darshraatparsadhraj5583
    @darshraatparsadhraj5583 Год назад +1

    1:08 But what if the number itself is only 3 digits?

    • @mr.duckie._.
      @mr.duckie._. Год назад +1

      divisible by 8 if the number is divisible by 8

  • @a.rahmanmohammed7455
    @a.rahmanmohammed7455 3 года назад +2

    Very nice video
    But why u did not give examples for 14 15 16
    It would be very helpful

  • @781rcac
    @781rcac 4 года назад +1

    For 17 it said we have to add up the remaining digits. But you subtracted them

  • @animefangamer277ominous_ab7
    @animefangamer277ominous_ab7 5 лет назад +2

    2,157,683 Isn’t Just Only Divisible By 11!
    (2 + 5 + 6 + 3) = 16
    - (1 + 7 + 8) = 16
    ______________________
    0 (11 Goes Into 2,157,683... 196,153 Times! And 196,153 Is Divisible By 53 Itself, By Going In 3,701 Times
    Those Are One Of The Bigger Examples Of Using 11’s Divisibility Rule...

  • @honeybee-oy4xs
    @honeybee-oy4xs 5 лет назад +4

    Sir/mam,In divisibility rule of 17,you said to add but in example you subtracted.

  • @himanshukumargupta8579
    @himanshukumargupta8579 2 года назад

    This video is so good all the conept is cleared now

  • @doomjunyu_
    @doomjunyu_ 6 лет назад +1

    I can't even calculate those small numbers

    • @mikawang
      @mikawang 6 лет назад

      Divide by 21: Apply both rules 3 and 7
      Divide by 22: Apply both rules 2 and 11
      Divide by 23: multiply last digit by 7, add remaining digit
      Divide by 24: Apply both rules...

    • @animefangamer277ominous_ab7
      @animefangamer277ominous_ab7 5 лет назад

      2, 3, 4, 6, 8, 12 Are The Numbers That Apply For 24, And Mika Wang, Are You Sure For 23’s Rule? (Last Digit x7 + Remaining Digits = Result Must Be Divided Evenly By 23: Including 0s And Negative Numbers)

    • @animefangamer277ominous_ab7
      @animefangamer277ominous_ab7 5 лет назад

      Mika Wang ... For 24... Maybe Applies To The Numbers 2, 3, 4, 6, 8, And 12...
      Then For The Divisibility Rules Of 25 - 30...
      25: Must End With 25, 50, 75, Or 00
      26: Applies To The Rules For 2, And 13
      27: Sum Of The Digits Must Be Divisible By 27 (Including Massive Numbers)
      28: Applies The Rules For 2, 4, 7, And 14
      29: (Final Digit x3) + (The Remaining Digits) = (Divisible By 29)
      30: Applies The Rules For 2, 3, 5, 10, And 15

    • @animefangamer277ominous_ab7
      @animefangamer277ominous_ab7 5 лет назад

      An Example For 29...
      What About 6,728?
      672| 8 - x3 -> 24
      +24

  • @Ineedsomesleeplol
    @Ineedsomesleeplol 2 года назад

    Before this vid I got an ad saying: are u still searching RUclips for math help really does vids from 2011 really help
    Me:actually ya it does it helps very much now get out of here

  • @milestailsprower4555
    @milestailsprower4555 2 года назад

    Since 11,060.5 is a multiple of 22 but the closest INTEGER MULTIPLE are 11,044 and 11,066 and thus, 11,060.5 isn't a integer multiple of 22.

  • @surbhivlogs143
    @surbhivlogs143 4 года назад

    Divisibility rule 17
    There should be substraction rule after multiplying the last digit of number by 5

  • @SzymekCSC
    @SzymekCSC 4 года назад +1

    1,380 is odd (1 380 is even)

  • @aartipawar9394
    @aartipawar9394 4 года назад

    The test of divisibility of 17 has been subtracted. It must be added according to test of divisibility. Please recover your mistake.

  • @deepthypoulose3638
    @deepthypoulose3638 5 лет назад +14

    Very precise and useful

  • @billyboyer9599
    @billyboyer9599 4 года назад +1

    Can you do Divisiblity Rules 21 to 40?

  • @sushmareddy5129
    @sushmareddy5129 4 года назад +4

    Time saving video💝..
    WARNING Long division😹

  • @taha6775
    @taha6775 3 года назад

    When the divisiblity rule of 17 comes you say multiply by 5 and add to remaining digits but when you do it you multiply by 5 and add

  • @milestailsprower4555
    @milestailsprower4555 2 года назад

    If is odd a remainder of 1 and is a rational by 2

  • @SzymekCSC
    @SzymekCSC 4 года назад +2

    12,580 is not divide by 10.
    10, 20. Not number 12,580!
    It's divide by 0,01.
    (12 580 divide by 10)

    • @Baburun-Sama
      @Baburun-Sama 3 года назад +1

      (realizes the comma is a thousands mark) Still Divisible by 10.

  • @pokemaster1945
    @pokemaster1945 6 лет назад +2

    At 2:22 you said 'add to the remaining digits' but then u subtracted

  • @muniyandithangasamy2696
    @muniyandithangasamy2696 3 месяца назад

    This took us 4 weeks to understand at school but 3 minutes at this video like for the top G for real🎉🎉🎉