In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

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

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

It is a 5 letter word if you take away first letter it is something you get from sun, if you remove second letter you will get something to eat, if you remove third letter you get a word you use in pointing at and if you remove the fourth letter you get something to drink. What is it?

There are forty elephants and they have forty-fore heads. How can this be possible?

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

When monkey rotate the gear, which mark will be hit 1 or 2 ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?