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.'

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Next Number in the Series,

5, 16, 49, 104, ?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What do you see in the image below

What does an Island and the letter T have in common?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?