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

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What makes this number unique: 8,549,176,320?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

In the picture given below, can you find out which digit will take place of the question mark?

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?

Can you spot the man between the coffee bean in the picture below ?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?