Replace the question mark with the correct number.

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?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

What is the last thing you take off before bed?

Why blonde cannot dial 911?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

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.