The least common multiple (LCM) of 14, 42 and 77 is:

A308

B462

C154

D168

Answer & Solution

Correct answer: B. 462

1. Prime factorise: 14 = 2×7, 42 = 2×3×7, 77 = 7×11. 2. LCM takes the highest power of each prime: 2 × 3 × 7 × 11. 3. = 462. _Source: RRB Group D CEN-02/2018 PYQ, Q.8._

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