A light flashes every two minutes a second light flashes every 3.5 minutes and a third light flashes every four minutes if all t

Question

2 years ago

6

hree lights flash together at 8 PM what is the next time of the day they were all flash together

2 answers:

Bezzdna [24] · Answer 1 · 2021-12-20T06:50:00+03:00

6 0

The answer should be 8:28 pm

Diano4ka-milaya [45] · Answer 2 · 2021-12-20T08:53:19+03:00

Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28

Multiples of 3.5: 3.5, 7, 10.5, 14, 17.5, 21, 24.5, 28

Multiples of 4: 4, 8, 12, 16, 20, 24, 28

The least common multiple of the 3 numbers is 28, so the lights will flash at the same time every 28 minutes.

The time will be 8:28 PM