Enperor's daughter.?

Question

Daughter wished to marry gardener, father said OK provided gardener placed 1 grain of rice on first square of chess board and doubled up each square of chess board until no.64 was reached.How much rice was required for dowry.

Answer 1

With a 1000 grains of rice being about 25 grams, or a little less than an ounce, a little over 1 trillion tons of rice will be required.

Or, in more practical terms, about 1700 years of the world's annual rice crop (about 593 million tons a year are produced world wide).

Answer 2

There are 2^(n-1) grains on the nth square. (2^63 on the 64th)
1+2+4+...+2^63 = 2^64-1 =18,446,744,073,709,551,615
The chess board had better be pretty big...
If every grain were 1 cubic millimeter in size (which is on the very small size), and at 10^18 cubic millimeters per cubic kilometer, the volume of the rice would be 18.45 cubic kilometers, or a cube about 2.64 kilometers per side.

Answer 3

2^64 - 1
grains of rice
that would make thousands of tons of rice... poor gardener...

Answer 4

2^63+1=9.22337203685E18 approximately

Answer 5

18446744073709551615

grains

Answer 6

lots