Discussion :: Problems on H.C.F and L.C.M
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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 ?
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Answer : Option D
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 | \(\frac { 30 } { 2 } \) | + 1 = 16 times. |
surely the bells will toll together after 120sec/2min but we given time frame of only 30mins datz ok y add 1 again?.
y add 1