Maths Set Theory Puzzle

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?




Similar Riddles

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Asked by Neha on 27 Sep 2023


Find out the missing number in the picture attached:

Find the Missing Number

Asked by Neha on 10 Jun 2023

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

Asked by Neha on 08 Jun 2025


A bomb exploded in a room full of married couples and no one died. How?

Asked by Neha on 10 May 2025

Solve below rebus puzzle?

Popular Rebus

Asked by Neha on 18 May 2023

Spot the cat in the picture below

Spot the Cat

Asked by Neha on 11 Apr 2021


If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Asked by Neha on 16 Oct 2025

The cream is heavier than Milk. True or False?

Asked by Neha on 18 Sep 2024

A blonde put eyeliner on her head. Why?

Asked by Neha on 26 Sep 2025


I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Asked by Neha on 18 Jan 2025

Hot Articles

Amazing Facts

Jigsaw puzzles

Jigsaw puzzles soared in popularity during the great depression, as they provided a cheap, long-lasting, recyclable form of entertainment.