The Restaurant's two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again ?

Answer 1

In 45 seconds.

9,18,27,36.45
15,30,45

Answer 2

Thank you so much I really needed help on this!!!