question_answer

Four bells ring at an interval of 6, 8, 12, 18 respectively. If they had last rang at 12: 40 PM, then at what time they will ring together again?

A)  1 : 15 PM                    

B)  1 : 30 PM

C)  1 : 45 PM                    

D)  1 : 52 PM

E)  None of these