Question

You hang two strands of decorative lights.

a strand of red and blue decorative lights a strand of yellow and green decorative lights
Strand 1: changes color every 18 seconds Strand 2: changes color every 27 seconds
Both strands just changed color. After how many seconds will the strands change color at the same time again?

The strands will change color at the same time again after
seconds.

Answer 1

The stands will change color at the same time after 54 seconds.

Explanation:

Find the Lcm number of both number (18 and 27)

The answer will be 54