4 bells ring together at a certain time. After this, they rang at intervals of 5, 10, 15 and 20 seconds respectively. After how many minutes will they be ringed together for the first time?
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Correct answer: C
Explanation
SSC MTS 2026 PYQ — Question 15
SSC MTS - 19 Feb 2026 - Shift 3 • Quantitative Aptitude • Q15