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.'

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

In the Mexico City area, there are two Houses H1 and H2. Both H1 and H2 have two children each.
In House H1, The boy plays for Mexico Youth academy and the other child plays baseball.
In House H2, The boy Plays soccer for his school in Mexico and they recently have a newborn.

Can you prove that the probability of House-H1 having a girl child is more than that of House-H2?

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?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you start the fire using two pieces of wood?

How can you make number one disappear by adding something to it?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?