Why are all black people so quick ?

Why 1729 is a magic number? Answer Logically.

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Vin Diesel is pulling a theft and has planned to run away with all the cash kept in the safe. But the only way to open the safe is the 13 character password. He has a set of five clues given to him by a trustworthy source.

Exactly two of the below statements are false.
The password is contained within this sentence.
The password is not in this hint.
The password is within only one of these statements.
At least one of the above statements is a lie.

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

In the picture given below, can you find out which digit will take place of the question mark?

Which alphabet letter is a question?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

The King of a distant land had heard that Birbal was one of the wisest men in the East and so desired to meet Birbal. He sent Birbal an invitation to visit his country.

In due course, Birbal arrived in the distant kingdom. When he entered the palace he was flabbergasted to find not one but six kings seated there. All looked alike. All were dressed in kingly robes. Who was the real king?

The very next moment he got his answer. Confidently, he approached the king and bowed to him.

How did Birbal know who was the real king?