There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Can you name an animal whose killing cannot be performed without spilling your own blood?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?