Video: KS2-M16 • Paper 2 • Question 14

Write all the common multiples of 3 and 8 that are less than 50.

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Video Transcript

Write all the common multiples of three and eight that are less than 50.

So we need to find multiples of three and eight that are less than 50. Here we have the multiples of three that are less than 50. Three, six, nine, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48. Here we have the multiples of eight that are less than 50. Eight, 16, 24, 32, 40, 48.

We’re looking for common multiples. In other words, numbers which are multiples of three and eight. 24 is a multiple of three and a multiple of eight. And 48 is a multiple of both three and eight. A quicker way to find the answer would be to recognize that eight times three is 24 and three times eight is 24. 48 is double 24 or 16 times three. And 48 is six times eight. The common multiples of three and eight that are less than 50 are 24 and 48.

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