RRB NTPC 2026 · Question 51 of 93

Three numbers are in the ratio 1 : 15 : 7, and their LCM is 4830. Their HCF is:

A43
B41
C49
D46Correct

Answer: D. 46

Explanation

Given: Ratio of three numbers = 1 : 15 : 7 LCM of the three numbers = 4830 Concept Used: LCM = HCF × LCM of ratio terms Solution: Let the numbers be: 1H, 15H, 7H LCM(1, 15, 7) = 3 × 5 × 7= 105 Now, LCM = 105H 105H = 4830 4830 966 H= = = 46 105 21

Source: RRB NTPC CBT-I Memory-Based Paper 16 March 2026 S1 (careerpower test-platform compilation) · memory-based

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