Select 2 unique numbers from 1 to 999999999999
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 499,999,999,998,499,974,283,264 (~500000 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,996,999,948,566,528 (~1000000 million trillion)
If order does not matter (e.g. most lottery numbers): 499,999,999,998,499,974,283,264 (~500000 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 999,999,999,996,999,948,566,528 (~1000000 million trillion)