brain teaser 1  

remove the sand from 2 minute hourglass timer. then fill it with the sand from 5 minute hourglass timer. so the 5 minute hourglass timer is now 3 minute hourglass timer.

Start both timers at once. As soon as the 2 minute one is finished, start the egg. There will be 3 minutes of time remaining in the 5 minute timer.

hmm use both the timers(they are not hourglasses :) )
when the sand in 2 min timer runs out start boiling the eggs
b boil till the sand in 5 min timer runs out

Use both timers. When the sand in the 2 minute timer runs through, start boiling the eggs and continue to boil until the sand in the 5 minute timer has run through. Hey presto, 3 minute eggs. LOL

RIDDLES FROM MY SIDE::::::

A] I am slim and tall, Many find me desirable and appealing. They touch me and I give a false good feeling. Once I shine in splendor, But only once and then no more. For many I am "to die for". What am I?

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B] Many things can create one, it can be of any shape or size, it is created for various reasons, and it can shrink or grow with time. What is it?