Question

a restroom Holiday Lights blinks once every 3 seconds why is there blue lights blink once every four seconds how many times will both sets of lights blink at the same time in 1 minute and 60 Seconds

Answer 1

10 times

Explanation:

The lights blink at the same time (if they ever do) every 12 seconds, the least common multiple of the individual times. Then in 120 seconds, they will blink together ...

120/12 = 10

times.

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You could count 11 (simultaneous) blinks, if you count the one at the start of a period of 120 seconds and also the one at the end of that period. If you start marking time between (simultaneous) blinks, you will count only 10.