What has many keys but can’t open a single lock?

What has no start, end, or centre?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

Find the value of "a" by solving the maths equation in the picture below:

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

What does Alexander the Great and Winnie the Pooh have in common?

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

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

What is always in front of you but can’t be seen?