Question

four bells ring at intervals of 3,7,12and 14 seconds respectively. At what time will they ring together if they start ringing at 7a.m

Answer 1

IFour bells ring at intervals of

3 , 7 , 12 , 14 seconds respectively.

We have to find LCM .

2 | 3 , 7 , 12 , 14
____________
7 | 3 , 7 , 6 , 7
____________
3 | 3 , 1 , 6 , 1
____________
***1 , 1 , 2 , 1

LCM = 2 × 7 × 3 × 2 = 84

At first the four bells rang at 7 a.m

Next they ring together

at 7 hr + 84 mi

= 7 hr + 1 hr + 24mi

= 8hr 24 mi

Answer 2

64 because
taking lowest common multiple 












































































thanku