Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Number System LCM and HCF
Six bells commence tolling together, afterwards, they toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together?
1
4
2
16
3
15
4
More than one of the above
5
None of the above