I am quite hot but become too cold if you remove the first two letters. What am I?

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?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

Can you write down eight eights so that they add up to one thousand?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

Can you solve below mathematical equation?

2^1234 - 2^1233

What does the below mathematical rebus mean?

The Little ant seems to be always confused. Do you know why?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C