thats 10 possibilities in 0-9, and 26 in A-Z, so 36 per character. for 5 characters that's 36^5 = *60 466 176*, which is plenty more than 35000. Brian Cummiskey wrote: > I have a random string generator using 0-9 and A-Z, and filling 5 places > (XXXXX) > > How many posibilities is this? The math to solve this evades me.