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

What month of the year has 28 days?

Asked by Neha on 08 May 2022


Today is a very icy and cold morning in Newcastle. Mr Shearer, an office bus driver arrived to pick up the employees from the last stop. Shearer suddenly remembers that he needs to pick a newly joined 4miles to the north. Mr Shearer lost his direction compass, a few minutes later Shearer is able to figure that he is moving in the correct direction i.e. north. How did Shearer know that he is moving in the correct direction?

Asked by Neha on 01 Aug 2024

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Easy Gallon Riddle

Asked by Neha on 21 May 2021


If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Asked by Neha on 25 Oct 2023

What is harder to catch the faster you run?

Asked by Neha on 17 Sep 2021

What does the below image rebus riddle means ?

Rebus Riddle

Asked by Neha on 04 Sep 2021


Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Asked by Neha on 07 Feb 2025

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

Asked by Neha on 09 Jul 2021

Can you find out the number of the parking space in which the car is parked?

Parking Space Riddle

Asked by Neha on 07 May 2026


What has to be broken before you can use it?

Asked by Neha on 06 May 2022

Hot Articles

Amazing Facts

Artificial Intelligence

Artificial Intelligence has crushed all human records in the puzzle game “2048,” achieving a high score of 839,732 and beating the game in only 973 moves without using any undo.