In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I taste better than I can smell. Who am I?

How can one talk without saying a single word?

What number do you get when you multiply all of the numbers on a telephone's number pad?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?