Name a key which is hardest to turn.

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Can you solve below mathematical equation?

2^1234 - 2^1233

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

There was a strange boy who was born before his father. How can this be possible?

What kind of band never plays music?

What has one letter and starts with an E?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?