Put 1 rice grain on square 1 of a chess board. Double the grains on each successive square to square 64. How m

Question

Put 1 rice grain on square 1 of a chess board. Double the grains on each successive square to square 64. How m

Answer 1

2^63 or 9,223,372,036,854,775,808 grains or rice! as in the parable of the peasant. I'm on to you!

Logarithmic decay or exponential growth.

Answer 2

:( My calculator doesnt go that high!!

Answer 3

The total number of grains is 2^64-1, as the sum 2^0 + 2^1 + ... +2^n is 2^(n+1)-1.

18446744073709551615 acording to Windows XP's calc.exe.

Answer 4

I give up - I started working it out but realised I'd misunderstood the question!

I thought you meant 1+2+3+4+5+6....up to 64, but that's not what you were after, so I'll leave it to the brainboxes on here!

Answer 5

2^63+2^62+2^61+...+2^3+2^2+2^1+2^0 grains of rice on the whole board.

18,446,744,073,709,600,000

That's about 18 and a half quintillion grains of rice.

Answer 6

I've got a math error...

lol...

Answer 7

I sat and worked this out once before calculators when I was a little boy more years ago than I care to remember now and it took me forever. An first glance it seems to be quite a simple equation but believe me it is a huge number. I for one am grateful to those that have mathematically expressed it here

Answer 8

There isn't enough rice in the world to do that.

You'll need a calculator.

Answer 9

thats a lot of rice!! its appoximately

1.144561273 x 10^30,

thats 9decimal places best the calculator does im afriad!!

each square has formula

2^n, where n is the square number,

Answer 10

too many to count!