Three traffic signals glow at intervals of 7,12, 14 second. When will they glow together?
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Given : Three traffic signals glow at intervals of 7,12, 14 second.
To Find : When will they glow together
Solution:
Three traffic signals glow at intervals of 7,12, 14 second.
To find When will they glow together , need to find LCM
LCM - Least common multiplier
7 = 7
12 = 2 * 2 * 3
14 = 2 * 7
LCM = 2 * 2 * 3 * 7 = 84
After 84 secs Three traffic signals glow together
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