What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Which tank will fill first?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

You need to remove two matchsticks to make the below equation true. Can you do it ?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What is red and smells like blue paint?

Next Number in the Series,

5, 16, 49, 104, ?

I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?