iPhone Giveaway of the Day - Math Gym

Maths Gym creates puzzles designed to exercise your mental arithmetic.

A series of calculations scroll up the page, and you have to work out the final answer. As you progress, the maths gets harder and scrolls away faster, but you can always pause it for thinking time or to see a hint.

With 10 levels of difficulty (from simple addition and subtraction through to cube roots and primes), and 10 speed settings, there is something to challenge everyone from junior school to maths graduate.

At the harder levels the calculations are often designed to be cancelled out by later ones. So it pays to look (and think) ahead.