Question

three neon lights are turnd on at the same time one blinks every 5 second the second every 12 and the third every 6 seconds in 5 minutes how many times will all three lights blink at the same time​

Answer 1

5 times

Explanation:

If we have to determine the number of times the lights will blink at the same time, we have to find Least common multiple (L.C.M) of 5, 12, and 6 seconds.

5 = 1 x 5

12 = 1 x 2 x 2 x 3

6 = 1 x 2 x 3

The L.C.M of 5, 6, and 12 is = 2 x 2 x 3 x 5 = 60

The three lights will be turned on after 60 seconds or 1 minute.

The lights will be turned on in 1 minute 1 time

The lights will be turned on in 5 minutes (1*5) times = 5 times