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?

What's the only room from which no one can enter or leave

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

Which is the smallest number that you can write using all the vowels exactly once?

I am sure no one can have two things for dinner. what are they?

Find the next number in the following series:
6, 14, 26, 98, __?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

Where do you go to learn how to make ice cream?

What is so fragile that saying its name breaks it?