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Nobody:
Q. You are given two candles of equal size, which can burn 1 hour each. You have to measure 90 minutes with these candles. (There is no scale or clock). Also u r given a lighter.
 Logical answer only!  :P

The Golden Girl =D:
I burn one candle and only quarter of the second.

Amii:
When 1 candle burns completely = 1 hr ie 60 mins will be completed

left is 30 mins ie half of an hour

So let the next candle burn until it is half - completeling the next 30 mins

I hope it doesn't sound stupid  :P

  

$tyli$h Executive:
First light both of them and when both are burned half,turn one of them off. And when the first one is burned completely for 1 hour, burn the left half .

Alpha:
This tempted me.  :P

Light one candle wholly => 60 mins

Light the second candle from both ends. Simple mathematics. ;)

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