What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Why is it against the law for a man living in Delhi to be buried in Mumbai?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?