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Home >> L.C.M >> Examples

Least Common Multiple (LCM) : Solved Examples

Prime Factorisation Method Division Method

Three electric bulbs blink after every 3 sec, 6 sec & 9 sec respectively. If all are switch on simultaneously. Find at what time; all will simultaneously blink again ?
Three bulbs blink after every 3 sec, 6 sec & 9 sec.

Now, find the LCM of 3, 6 and 9 and we get:

LCM = 18

Therefore, all three electric bulbs will blink again simultaneously after every 18 sec.

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