Select 21 unique numbers from 10 to 100
Total possible combinations (ways)
If order does not matter (e.g. most lottery numbers): 220,916,541,203,370,770,432 (~220.9 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 11,286,834,231,395,481,871,318,731,333,374,884,970,496 (~1.1286834231395E+22 million trillion)
If order does not matter (e.g. most lottery numbers): 220,916,541,203,370,770,432 (~220.9 million trillion)
If order matters (e.g. pick3 numbers, permutations, lock combinations, pin-codes): 11,286,834,231,395,481,871,318,731,333,374,884,970,496 (~1.1286834231395E+22 million trillion)