Civil Services UPSC EPFO (EO/AO) Mock Test 2023 Quantitative Aptitude Number System LCM and HCF

Pendulum A rings once in 3 seconds and another pendulum B rings 4 times in 7 seconds. If both the pendulums start ringing at the same time, how many times will they ring together in 1 minute?

1
4
2
1
3
2
4
8
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