Allied & ICAR Exam Bank • ALLIED_1378 MCQ • 1 Mark

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Numerical Computation

Question Statement:

Four bells toll together at intervals of 6, 8, 12, and 18 seconds respectively. If they toll together now, after how many seconds will they next toll together?

Options:

  • (A) 72 seconds
  • (B) 36 seconds
  • (C) 144 seconds
  • (D) 48 seconds

Answer Key:

A

Step-by-Step Solution & Explanation

LCM of 6, 8, 12, 18: $6 = 2 \times 3$, $8 = 2^3$, $12 = 2^2 \times 3$, $18 = 2 \times 3^2$. LCM = $2^3 \times 3^2 = 8 \times 9 = 72$ seconds.
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