Find the HCF and LCM.
(i) 14, 28
(ii) 32, 16
(iii) 17, 102, 170
(iv) 23, 69
(v) 21, 49, 84

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Solution

(i)

HCF = 2 × 7 = 14
LCM = 2 × 7 × 2 = 28

(ii)

HCF = 2 × 2 × 2 × 2 = 16
LCM = 2 × 2 × 2 × 2 × 2 = 32

(iii)

HCF = 17
LCM = 17 × 2 × 3 × 5 = 510

(iv)

HCF = 23
LCM = 23 × 3 = 69

(v)

HCF = 7
LCM = 3 × 4 × 7 × 7 = 588

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