Select 1 unique numbers from 1980 to 1997
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 18
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 18
If order does not matter (e.g. most lottery numbers): 18
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 18