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?

Find out the number of circles in the given picture having Illusion

Can you find out who is the kidnapper in below Picture and why, Explain ?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

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

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

What's a single-digit number with no value?

What can you see in the middle of March and April that you can never see in any other month?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?