What does it mean?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Can you count the number of squares in the given picture?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

What country can make you shiver?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Why do we preferably have round manhole covers and not square ones?