7,14,21,28,35,42,49,56,63,70,77,84,91
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72.
21: 21, 42, 63, and 84!
15, 30 & 45
all whole numbers that end with 00
Just 72. It was found by multiplying 8 and 9. --------------------------------------- The common multiples of two numbers are the multiples of their lowest common multiple. LCM(8, 9) = 72 The common multiples of 8 and 9 are 72, 144, 216, ... The only common multiples less than 100 are 72 only.