Reply to: was spam - now how to count big numbers

Re: Calculator using cheats

which is about the number of brain cells I lost over the festive season.

Re: Calculator using cheats

9,223,372,036,854,775,808

Re: Calculator using cheats

Whereas 2^64 would reach the Ooooooooooooooort Cloud?

Re: Calculator using cheats

The pile of rice on tha last square would just about reach to Pluto.

Calculator using cheats

I meant the full number like: 9223372036854775808

:rollin

1.84 e19?

is surely 2 to the power of 64?

I'll go for 9.22337203685478e+18

Re: countdown......

Maths for beginners

2nd square = 2 grains
3rd square = 4 grains ie 2 squared
4th square = 8 grains ie 2 cubed
64th square = 2 to the power of 63
5 = 16
6 = 32
7 = 64
8 = 128
9 = 256
10 = 512
11 = 1024
12 = 2048
13 = 4096
14 = 8192
15 = 16384
16 = 32768
17 = 65536
18 = .... anyone want to continue

Re: countdown......

I'll have to take my shoes off to do that...

Re: countdown......

Now do come on, all the digits... 0]

Re: countdown......

1.84 e19?

Re: countdown......

roger rabbit & Mordac: Both wrong, it is Indian in origin.

Now pencil and paper time: what is the number of grains for the last square?

Oh, and if you manage to use a calculator to work it out, pray do tell which model. :rollin

Re: countdown......

Please take me off your mailing list. Here's a dollar! I thank you.

Re: countdown......

I think it's a Chinese proverb. There wouldn't have been enough rice in the whole of China to cover the amount needed for the last square. How it would all have fitted on the square is another question...

Right, time for a

Re: countdown......

Ryan, there is an old arabic? proverb about a wise man who did a favour for a nasty old King. King said thanks I'll give you a chest of gold as a reward. Wise man said no all I want is a grain of rice on the first square of a chess board, 2 on the second, 4 on the third etc.

Nasty old king laughed at his good fortune at only having to give up a few grains of rice and said fine. You know the story I guess.

Re: countdown......

9.