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

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Asked by Neha on 31 Oct 2025


What is the word or phrase below?
R | E | A | D

Asked by Neha on 28 Jul 2024

What have one eye but still cannot see?

Asked by Neha on 27 Dec 2025


A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Asked by Neha on 01 Feb 2023

Which country gets ill every time?

Asked by Neha on 14 Feb 2025

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

Asked by Neha on 12 Oct 2025


Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Asked by Neha on 24 Sep 2021

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

Asked by Neha on 23 Sep 2025

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Asked by Neha on 26 Apr 2023


Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Asked by Neha on 18 Mar 2024

Hot Articles

Amazing Facts

Word ladder puzzle

The word ladder puzzle was invented by Lewis Carroll, author of Alice’s Adventures in Wonderland.