Question

3 traffic lights blink together at 9am. If they blink after 72 seconds, 96 seconds, 120 seconds, then at what time they will blink again?
Plz I want full sol

Answer 1

Answer:

144 seconds it will blink again

Step-by-step explanation:

Subtract 72 from 96

96-72=24

Then add 96+24=120

You get the answer

Then ,120+24=144

That is there is a difference of 24 second .In every 24 second it blinks