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You are given two candles of equal size, which can burn 1 hour each. You have to measure 45 minutes with these candles. (There is no scale or clock). You are also given a lighter.

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First burn both candles, one candle only from one side and other candle at both side.
Second candle burning from both end will burn out in 30 minutes. at this point light up other side of first candle which would have burnt half by now. it will take another 15 minutes to completely burn that candle.
9 years agoHelpfull: Yes(1) No(0)

lighten both side of a candle and one side of another. When the first candle is finished then it measures half hour and at that mean time lighten another end of the second candle. Finishing of the second candle will denote 45 minute.
8 years agoHelpfull: Yes(0) No(0)

HR Interview Other Question

a rectangular box of length 4cm, breadth 3cm, height 5cm. the opposite sides of 4cm*3cm are painted red, opposite sides of 3cm*5cm are painted blue and rest 5cm*4cm with yellow. finally it is cut into 1*1*1 cuboid If we subtract a number with y, we get 4 increase of number, once it got divided by y itself.. find that number?