Each square doubles the last, so the whole board comes to 2 to the power of 64, minus 1. That’s over 18 quintillion grains.
The inventor of chess asks his king for a reward: a grain of wheat on the first square of the board, two on the second, four on the third, and so on, doubling every square up to the sixty-fourth. How many grains is that?
Give me a hintThe hint
Each square holds a grain more than all the squares before it put together.