Select 2 unique numbers from 1 to 1000000000
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 499,999,999,500,000,000 (~500 thousand trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,000,000,000 (~1000 thousand trillion)
If order does not matter (e.g. most lottery numbers): 499,999,999,500,000,000 (~500 thousand trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,000,000,000 (~1000 thousand trillion)