Only 8% Can Do All 10 Of These In Their Head

No pen, no calculator, no scrolling back. Ten sums against your own working memory.

356,000+ people have played this

One short ad, then your 10 questions begin.

About this quiz

Ten arithmetic problems meant to be done in your head: multiplication, percentages, order of operations and a little fractions.

There is no timer, but part of the challenge is holding the numbers without writing them down. Your score is how many of the ten you get right.

How to play

1 Answer ten mental arithmetic questions in one quick round.
2 Pick one of four answers for every question — each locks in as you go.
3 Finish all ten to reveal your score and a full answer review.

For entertainment and general learning only. This is not professional advice, training or a formal assessment, and questions are drawn from widely accepted introductory sources.