Three bells ring at intervals of 15 20 and 30 minutes respectively If they all ring at 11 00 AM toge...........

Quantitative Aptitiude (CLAT) LCM, HCF

Three bells ring at intervals of 15, 20 and 30 minutes respectively. If they all ring at 11:00 AM together, at what time will they next ring together?

11:30AM

12 Noon

12:30 PM

1:00 PM

Explanation:

To understand when they would ring together we need to find the LCM of 15, 20 and 30. The LCM of the three numbers is 60.
Hence all the bells will ring together after 60 minutes. So all 3 bells will ring together at 12:00 Noon.