Select 13 unique numbers from 18 to 21
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 67,108,864 (~67.1 million)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 67,108,864 (~67.1 million)
If order does not matter (e.g. most lottery numbers): 67,108,864 (~67.1 million)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 67,108,864 (~67.1 million)