HCF = H, LCM = 12H Sum → H + 12 H = 403 H = 31 HCF = 31 LCM = 12 × 31 H = 31 Let No’s 31x 31y LCM ⇒ 31xy = 12 × 31 ⇒ xy = 12 If (1, 12) ⇒ 1 × 31 = 31, 31 × 12 = 372 → not less than LCM If (3, 4) ⇒ 3 × 31 , 4 × 31 = 93, 124
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