When can we add 2 to 11 and get 1 as the correct answer?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you start the fire using two pieces of wood?

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.'

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Why did Buffon take the goal with him after every Juventus match?