Why 1729 is a magic number? Answer Logically.

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Count the squares in the matchstick puzzle below?

What has many teeth, but cannot bite?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Can you find the key in the picture below?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?