If you put a coin on a square than 2 coins on the next square than 4 than 8 than 16....althe way to the 64th square how many coins will you have and what is a formula for finding any number of squares?

You'll need 2 to the power of 63 coins for the last square. This number is so large that there isn't enough room on the website. The total number of coins is (2 to the power of 64) -1, which is almost twice as many For a board of N squares you need (2 to the power N)

• 1 coins. As an illustration, for a 2 x 2 (or 1 x 4) board you

would need 1 + 2 + 4 + 8 coins, ie 15 which is (2 to the power 4) - 1.