Select 4 unique numbers from 0 to 20
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 5,985
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 143,640 (~143.6 thousand)
If order does not matter (e.g. most lottery numbers): 5,985
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 143,640 (~143.6 thousand)