Three bells rings at an interval of 35and 42 minutes respectively if they last rung at 12:00 when will they ring next

Question

Three bells rings at an interval of 35 and 42 minutes respectively .If they last rung at 12:00 at what time will they ring next?

Answer 1

You first get the L.C.M of 35and 42 which is 210 so this will be minutes.
Then you convert minutes to hours which will be 3½ hours. You add it to the time and your answer will be
             1530 hours or 3.50 pm

Answer 2

3.50

Answer 3

3.50

Answer 4

3.50

Answer 5

3.50

Answer 6

3:30