One of the number = 240 Sum of LCM and HCF = 1,740 LCM + HCF = 1,740 ......(1) or LCM = 28 (HCF) Put this value in equation (1) HCF + 28(HCF) = 1,740 29 (HCF) = 1,740 So, HCF =
1740
29
=60 HCF = 60 We know that, Product of two numbers = Product of HCF and LCM. 240 × y = 28 (HCF) × 60 240y = 28 × 60 × 60 y=
28×60×60
240
=420 The sum of the digits of the other numbers is 6.