Question

The traffic lights at three different signals change after 48 seconds, 72 seconds and 108. If they change at 7
a.m. simultaneously. How many times they will change between 7 a.m. to 7:30 a.m.
simultaneously?
(Haryana NTSE Stage-1 2015)
(A) 3
(B) 4
(C) 5
(D) 2
​

Answer 1

4 times I thinkkkkkkkkkkk