Find out the missing number in the picture attached:

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?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

What is the difference between a jeweller and a jailer?

What does below Rebus say?

XLR8

Can you find the mistake in the below statement?

Identify the hidden meaning behind this picture?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3