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’m orange, I wear a green hat and I sound like a parrot. What am I?

Asked by Neha on 26 Aug 2025


A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

Asked by Neha on 02 Jul 2024

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

Asked by Neha on 20 Mar 2022


Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Asked by Neha on 26 Jul 2025

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Asked by Neha on 21 Jan 2024

Can it be possible to build a house that has all its four walls facing towards the South?

Asked by Neha on 20 May 2024


How many triangles can you find in this given picture?

Count the Triangles

Asked by Neha on 27 Feb 2023

I have Rs.50 and I spend it in the way as below.

Fund and Spends

Asked by Neha on 01 Oct 2023

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

Asked by Neha on 19 Jun 2024


John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?

Asked by Neha on 23 Aug 2023

Hot Articles

Amazing Facts

Crossword

The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.