Question

Four traffic signal glow at intervals of 5,10,15and20 minutes when will they glow together​

Answer 1

Answer:

60 minutes

Step-by-step explanation:

the answer is the LCM of given numbers..

LCM of 5 , 10 , 15 ,20 is => 60

Thus , they'll glow together after 60 minutes

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Answer 2

Answer:

60 min

Step-by-step explanation:

Given three traffic signals glow at intervals of 5, 10,15 and 20 minutes. So to glow together we need to find the LCM of the given numbers.

So LCM of 5,10,15 and 20=60

So together they will glow at 60 min

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