Question

two of the lights at the christmas tree are flickering they both just flickered at the same time 06.40 am one of the lights flickered every 6 minutes the other light flickered every 8 minutes both light will be flicker again at...?

Answer 1

Answer:

LCM of 7 and 8 is 56

so your answer is 56

Answer 2

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At 12 minutes past 6.40AM, all the lights will flicker together.

Interval at which all shall flicker together can be found by calculating LCM of all the interval values (6,8minutes).

LCM of 6 and 8 minutes is 24minutes

therefore,they will flicker again

=>6.40AM+24MIN.

=>7.04AM

both light will be flicker again at 7:04Am