Select 2 unique numbers from 1 to 645
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 207,690 (~207.7 thousand)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 415,380 (~415.4 thousand)
If order does not matter (e.g. most lottery numbers): 207,690 (~207.7 thousand)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 415,380 (~415.4 thousand)