A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Can you tell a 3D object that has just two surfaces?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Who are the happiest people in IPL match?