Question 979142


you got it right


{{{2^0 = 1}}} grain on the first square
{{{2^1 = 2}}} on the second square
{{{2^2 = 4}}} on the third square
{{{2^3 = 8}}} on the fourth square
...
{{{2^63}}} on the {{{64th}}} square
(exponent is always one less than the # of square {{{1}}} to {{{64}}})

Answer is {{{2^63=9.223372036854775808*10^18=9.2*10^18}}} grains of sand on the 64th square.

Note: Do not subtract {{{1}}}.
{{{2^63}}} is not the same as {{{2^(64- 1)}}}