# Easy Number System Solved QuestionAptitude Discussion

 Q. IBM-Daksh observes that it gets a call at an interval of very 10 minutes from Seattle, at every 12 minutes from Arizonia, at the interval of 20 minutes from New York and after every 25 minutes it gets the call from Newark. If in the early morning at 5:00 a.m. it has received the calls simultaneously from all the four destinations, then at which time it will receive the calls at a time from all places on the same day?
 ✔ A. 10:00 am ✖ B. 3:00 am ✖ C. 5:00 am ✖ D. Both (A) and (B)

Solution:
Option(A) is correct

IBM – Daksh gets simultaneous calls from all the placers after an interval of time given by the LCM of 10, 12, 20 and 25 which is 300.

So, the next simultaneous calls are received after 300 minutes or after 5 hours or at 10:00 a.m.

Hence option(A) is the correct choice.

## (2) Comment(s)

Rohit Chaudhari
()

Why not Option D (i.e both A and B)?

MITTA BHUVANESH
()

because option is B 3.00 am...if it is 3.00pm it would be correct