railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Number System LCM and HCF
Three bells commence tolling together and toll at intervals of 8 sec, 10 sec and 12 sec respectively. In 30 min, how many times do they toll together?
1
14
2
17
3
16
4
18