To find the least number of hot dogs and buns Aldo could have bought, we need to find the least common multiple (LCM) of 10 and 12.
Multiples of 10: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, ...
Multiples of 12: 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168, 180, 192, 204, 216, 228, 240, ...
The LCM is the smallest number that appears in both lists, which is 60. Therefore, Aldo could have bought 60 hot dogs and 60/12 = 5 packs of buns (since each pack has 12 buns), or 5*12 = 60 buns.
Answer: Aldo could have bought 60 hot dogs and 60 buns.