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General Knowledge Class 4 - Maths Fun Notes

Comprehensive study notes for Class 4 - Maths Fun olympiad preparation

Maths Fun

Welcome to the chapter on Maths Fun for Class 4. In this chapter, you will explore interesting facts, puzzles, and tricks in mathematics. By the end of this chapter, you will enjoy solving maths problems and discover how maths is used in everyday life!

Introduction

Maths is not just about numbers and sums. It is also about patterns, puzzles, and fun tricks! Let's make maths exciting and learn in a playful way.

Amazing Maths Facts

  • Zero is the only number that cannot be represented by Roman numerals.
  • A triangle has three sides and three angles.
  • The number 9 is called a magic number because the sum of the digits of its multiples is always 9 (e.g., 18: 1+8=9).

Maths Puzzles

  • What comes next: 2, 4, 6, 8, ___?
  • I am a three-digit number. My tens digit is 5 more than my ones digit. My hundreds digit is 8 less than my tens digit. What number am I?

Maths Tricks

  • To multiply any number by 10, just add a zero at the end!
  • The sum of the angles in a triangle is always 180 degrees.
  • If you add any number to zero, the answer is the number itself.

Maths in Daily Life

  • We use maths to count money and buy things.
  • Maths helps us read the time and measure objects.
  • We use maths to share and divide things equally.

Fun Activity: Maths Treasure Hunt

Find five things at home that have numbers on them. Write down where you found each number!

Summary

  • Maths is fun and useful in everyday life.
  • There are many interesting facts and tricks in maths.
  • Solving puzzles helps us think better.

Practice Questions

  1. What is the next number in the pattern: 5, 10, 15, ___?
  2. How many sides does a rectangle have?
  3. What is 7 + 0?
  4. If you multiply 6 by 10, what do you get?
  5. Name a place where you use maths every day.

Challenge Yourself

  • Make your own maths puzzle and ask your friends to solve it.
  • Find out the largest number you can write using three digits.

Did You Know?

  • The word "mathematics" comes from a Greek word meaning "learning".
  • Maths is used in sports, cooking, shopping, and even music!

Glossary

  • Pattern: A repeated arrangement of numbers or shapes.
  • Puzzle: A problem that needs to be solved.
  • Angle: The space between two lines that meet.
  • Digit: Any of the numbers from 0 to 9.

Answers to Practice Questions

  1. 20
  2. 4
  3. 7
  4. 60
  5. (Any: home, school, shop, etc.)

Maths is everywhere! Keep exploring and have fun with numbers and shapes.

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