Select 4 unique numbers from 1 to 400
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 1,050,739,900 (~1.1 billion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 25,217,757,600 (~25.2 billion)
If order does not matter (e.g. most lottery numbers): 1,050,739,900 (~1.1 billion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 25,217,757,600 (~25.2 billion)