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

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Asked by Neha on 17 Apr 2022


Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Asked by Neha on 05 Sep 2021

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Asked by Neha on 09 Nov 2025


why number 8549176320 is one of a kind?

Asked by Neha on 17 Apr 2023

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

Asked by Neha on 28 Jan 2023

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Asked by Neha on 19 Dec 2023


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

Asked by Neha on 28 Feb 2023

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Two Door Two Guard

Asked by Neha on 06 Mar 2021

Which alphabet is a part of our body?

Asked by Neha on 03 Nov 2023


Can you identify the famous TV character from the rebus below?

Uncover TV character

Asked by Neha on 22 Nov 2023

Hot Articles

Amazing Facts

Word ladder puzzle

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