Elitmus Exam Category

Any body had given the exam on 17 August 2014.

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Elitmus Other Question

Q)Sana light 2 candle for study.Thick candle take 6 hr to melt and thin take 4 hr.Sana slept while studying.how long sana study if at that tym thick candle length is twice the thin candle. X is d product of all the integers from 300 to 400.
Y is d product of all the integers from 300 to 401.
what is (1/x + 1/y) in terms of Y?