railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Number System LCM and HCF
5 bells ring simultaneously at intervals of 4, 5, 8, 9 and 10 seconds. All the bells start ringing simultaneously. When will they play together next time:
1
6 minutes later
2
8 minutes later
3
4 minutes later
4
9 minutes later