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

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

What has many teeth, but cannot bite?

There is a place where if I stand up straight, I will still be considered sideways.

What does this say?

XLR8

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?