Question
Find the difference between sum of digits of LCM and
HCF of 16, 40 and 64.Solution
16 = 2⁴ 40 = 2³ × 5 And 64 = 2⁶ So, HCF = 2³ = 8 So, sum of digits of HCF = 8 = 8 And LCM = 2⁶ × 5 = 320 And sum of digits of LCM = 3 + 2 + 0 = 5 So, required difference = 8 - 5 = 3 Hence, option c.
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