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

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is black when you buy it, red when you use it, and gray when you throw it away?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Can you find the 09 errors in the picture below?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Find out the missing number in the picture attached:

If your uncle’s sister is not your aunt, what relation is she to you?

Take one out and scratch my head, I am now black but once was red. What am I?

What has one letter and starts with an E?