Q: Common multiples of 9 and 21 that are less than 100?

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24, 48, 72, 96

72

4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96

4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96 are the multiples of 4 that are less than 100. For them to be common, they need to be compared to another set of multiples.

The multiples of 5 that are also multiples of 6 are multiples of their LCM. The LCM of 5 and 6 is 30, so the question becomes which multiples of 30 are less than 100? The solution is the numbers: 30, 60, 90

Related questions

44 and 88 are the only common multiples of 4 and 11 that are less than 100

9,18,27,36,45,54,63,72,81,90,99

72.

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.

44 and 88

44 and 88

itzz 63

44 88

36 and 72

Just 63.

72.

24,48,72, and 96