Question

Strand A changes color every 14 seconds. Strand B changes color every 20. Both strands just changed color. After how many seconds will the strands change color at the same time again?

Answer 1

140

Explanation:

14, 28, 42, 56, 70, 84, 98, 112, 126, 140.

20, 40, 60, 80, 100, 120, 140.

14 x 10 = 140

20 x 7 = 140