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.'

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

How can you write nineteen in a manner that if we take out one, it becomes twenty?

How is a fly different from a mosquito?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

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

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?