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?

Replace the question mark with the correct number in the below-given picture?

What has no start, end, or centre?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Find the last number in the series below:

voN luJ yaM raM ---

What has lots of eyes, but can’t see?

Can you make four (4) nines (9) equal 100?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair