By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

How many Watermelons are there in the below picture?

Can you name some countries which do not have the alphabet 'A' in them?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?

Which is faster, Heat or Cold ? Explain.

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What can jump higher than a building?