Select 2 unique numbers from 1 to 638
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 203,203 (~203.2 thousand)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 406,406 (~406.4 thousand)
If order does not matter (e.g. most lottery numbers): 203,203 (~203.2 thousand)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 406,406 (~406.4 thousand)