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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
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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