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Aptitude - Problems on H.C.F and L.C.M - Discussion

Discussion Forum : Problems on H.C.F and L.C.M - General Questions (Q.No. 3)
Problems on H.C.F and L.C.M
3.
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?
4
10
15
16
Answer: Option
Explanation:

L.C.M. of 2, 4, 6, 8, 10, 12 is 120.

So, the bells will toll together after every 120 seconds(2 minutes).

In 30 minutes, they will toll together 30 + 1 = 16 times.
2

Discussion:
170 comments Page 16 of 17.
Naveen said:   1 decade ago
Really good explnation.
Saif said:   8 years ago
Thanks @Balaraju Hari.
Jai bharath said:   8 months ago
Thanks for the answer.
K.gayathri said:   9 years ago
What is mean by toll?
Sapana said:   8 years ago
How to calculate 120?
GSS said:   6 years ago
Thnaks @Sravanreddy.
Riya said:   6 years ago
Thanks @Sravanreddy.
Ramya.S said:   7 years ago
Thank @Sravanreddy.
Shanmathi said:   9 years ago
Nice post @Sundar.
Kishore said:   7 years ago
Well done @Sundar.
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