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Mathematics for IGCSE & O level - Number (Section 2 - No. 37)

What is the LCM of 27 and 63?

9

189

21

3

Selitys

27 = 3 x 3 x 3, and 63 = 3 x 3 x 7. Therefore the LCM = 3 x 3 x 3 x 7 = 189.

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