mathletics level 1 world record 143(157 latest)

Donal Shiju achieving 143 in live mathelitics level 1,which is 2.38 calculations per second.(Donal`s latest score is 157
• mathelitics new world ...
that is 2.61 calculations per second for one minute) Highest score claimed in mathelitics is 141 by another boy.
slowdown in the settings to see the answers, some of them may not show up in the screen when the enter button pressed too quickly,
please comment if anyone achieved more than this。(which is not impossible)