Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

Rearrange the letters in "new door" to make one word.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Which is faster, Heat or Cold ? Explain.

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Which is Odd One Out and why?

4377

3954

9862

8454

9831