Advertisement Remove all ads
Advertisement Remove all ads
MCQ
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12s respectively. In 30 min, how many times do they toll together?
Options
4
10
15
16
Advertisement Remove all ads
Solution
16
Explanation:
LCM, of 2, 4, 6, 8, 10, 12, is 120.
So, the bells will toll together after every 120 s (2 min).
In 30 min, they will toll together `30/2` + 1 = 16 times
Concept: Number System (Entrance Exam)
Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads