There are two bells in the school. Bell A rings every 6 minutes. Bell B rings every 8 minutes. If both bells ring together at 5.05 p.m., when will they ring together again?

4 bells of a church ring every 5, 10, 12, 15 minutes respectively. If all the four start ringing at 8 a.m. At what time will all the bells ring together again?a.9:10a.mb.9 a.mc.9:15a.md.9:30a.m

Four bells ring at the intervals of 6min, 8min, 4min and 3min respectively. If they have started altogether at 7am, at what time once again they will ring altogether for the first time?7.24am8.00am7.48am8.12am

Four bells began to toll at 5, 8, 9, and 10 seconds respectively. In 2 hours, how many times will they toll together?

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again for the first time?

In a school, each class of a primary standard is of 40 minutes, and each class of a secondary standard is of 60 minutes. School bell rings for both the standard after each class gets over. For how many time the bell rings in common for both primary and secondary class when the 1st class of each standard starts at 7:00 AM and finishes at 12:20 PM (Note: no recess break is given in between)