2^5=32. So 0-31.
2^3=8. So 0-7.

I.e. for 3 bit:

000 - 0
001 - 1
010 - 2
011 - 3
100 - 4
101 - 5
110 - 6
111 - 7

Chen Xiao Fan wrote:
> Sorry but I think 3 bit of random number is not
> the same as 0-7 and 5 bit of random number is not
> the same as 0-31. Do I miss something obvious?
> 
> Regards,
> Xiaofan
> 

-- 
Hector Martin (hector@marcansoft.com)
Public Key: http://www.marcansoft.com/hector.asc

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