what does the below rebus means?

What is the largest number you can write with just 3 digits?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Prove that the below maths equation is true.

8 + 8 = 91

You can see three almost identical images below. Can you spot the odd one out from them?

Replace the question mark with the correct number below.