If eleven plus two equals one, what does nine plus five equal?

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.'

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

I have teeth but i don't bite. Who Am I ?

What is next number in the pattern below:

131 517 192 123 ?

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

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

Which is the correct shadow of the bird?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?