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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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