Question
Find the difference between sum of digits of LCM and
HCF of 45, 60 and 75.Solution
45 = 3² × 5 60 = 2² × 3 × 5 And 75 = 3 × 5² So, HCF = 3 × 5 = 15 So, sum of digits of HCF = 1 + 5 = 6 And LCM = 2² × 3² × 5² = 900 And sum of digits of LCM = 9 + 0 + 0 = 9 So, required difference = 9 - 6 = 3 Hence, option b.Â
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