I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What is the centre of gravity?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

Can you find the 09 errors in the picture below?

A man dies of old age on his 25 birthday. How is this possible?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?