So, no valid answer yet?

How about this?
Code:

int rand7()
{
  int x;
  do
  {
    x = ((rand5()+5*rand5())-5);
  } while(x>21);
  return ((x%7)+1);
}


Again, top of my head. But it gives equal probability (no dice effect).
I do not like the loop, but it is quicker than finding the LCD.

Last edited by Doug; 10/29/07 20:19.
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