Multiple choice

Three bells toll together at intervals of 9,12,15 minutes. If they start tolling together, after what time will they next toll together?

  1. 1 hour

  2. 1 and half hour

  3. 2 and half hours

  4. 3 hours

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

[Explanation: We have to find out the LCM of 9,12,15 which comes out to be 180. So, the 3 bells toll together after 180 minutes which is equal to 3 hours.]