Can you name some countries which do not have the alphabet 'A' in them?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

How is a fly different from a mosquito?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Solve the puzzle by telling what does below picture means.

Which letter of the alphabet has the most water?