Question

5. Three traffic signals glow at intervals of 10, 12 and 15 minutes, if these signals glow together at certain time, when will they glow together.

find the answer by using LCM​

Answer 1

Answer:

After 1 hour.

SOLUTION:

LCM of 10, 12, 15:

=> 10= 2×5

=> 12= 2×2×3

=> 15= 3×5

LCM= 2×5×2×3= 60.

Answer: 60 minutes.