I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

What goes through cities and fields, but never moves?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

What is more useful when it is broken?

I have Rs.50 and I spend it in the way as below.

I’m orange, I wear a green hat and I sound like a parrot. What am I?