Hi, couldhI,Hi, could someone help me with this question please. I though that A was the answer, but in fact is B.

2 -The fairy lights on a Christmas tree are in three colours, blue, green and silver. The blue lights flash every 5 seconds, the green lights flash every 8 seconds and the silver lights flash every 12 seconds. The lights have all just flashed at the same time.

How many times will they all flash at the same time in the next 45 minutes?

A 5

B 22

C 45

D 108

E 112