Math Problem Somebody Please help!?

Question

Place two grains of rice on the first square of a chessboard. Place four grains on the second square, eight on the next, and so on, doubling each pile of rice till the last square. What is the number of grains of rice there would be on the last square using an exponent. (there are 64 squares on a chess board)

Answer 1

There will be 18446744073709551616 pieces of rice on the final square.

Answer 2

Well, the second square is 2², the third is 2³, the fourth is 2⁴, so it's 2 to the number square it is, so it would be 2⁶⁴

Answer 3

The first space has 2^1, the second has 2^2, the third has 2^3, and so on. So the 64th will have 2^64.