Art of Problem Solving: 2017 AMC 10 A #25

[@Huh_Youtube]

richard is amazing

[@etogeneral]

I wish you could also do the 10B questions please

[@BrotherSquid]

Great Video! I took this test recently and now I know I surely failed this question

[@parkertyson5757]

"42 that is a nice number" ;)

[@fitnessabdul6811]

Indeed it is!

[@theevilmathematician]

just need to add a 0 at the end :D

[@victortang5076]

@@theevilmathematician 😏indeed

[@sanjaytiwarytiwary6450]

yup 486 is very tempting

[@helo3827]

Is there a nicer solution than casework?

[@anythingatall1471]

yup! Find the ones that work from 110 to 198, then multiply by 8. Remember to add 2 because of the 990 that doesn't include all the rest of those.

[@zmaj12321]

So many special cases for this question.

[@chandanamr]

I like you solution a lot better Richard.

[@MyRemoteIsBroken]

thank ya Richard

[@chandanamr]

I watched the math jam just now

[@aiyer917]

Lol I bashed this in the actual test
Got it wrong definitely.

[@apratimghosh109]

Unfortunately I will not be able to write this exam....not from US...:(

[@apratimghosh109]

cool!