Question

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Find the LCM of 78 and 96.
With full explanation

Find the HCF of 78 and 96 .
With full explanation


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Answer 1

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Answer 2

LCM - group common factors

78 = 2 x 3 x 13 while 96 = 2 x 2 x 2 x 2 x 2 x 3

Therefore LCM = 2 x 2 x 2 x 2 x 2 x 3 x 13 = 96 x 13 = 1248

HCF - list all factors

78 = 1, 2, 3, 6, 13, 26, 39, 78

96 = 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96

Therefore HCF = 6

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