CONCEPT OF MATHEMATICS

🧮 Revision: Concept of Mathematics

1. Define the term mathematics.
2. List five different branches of mathematics.
3. What is the importance of learning mathematics in everyday life?
4. Write the set of natural numbers less than 10.
5. List all odd numbers between 1 and 20.
6. Identify the types of numbers: 4, 0, -2, 3.5, ⅔
7. What is the smallest prime number?
8. List the first 6 multiples of 4.
9. Find the HCF of 18 and 24.
10. Find the LCM of 6 and 8.
11. Round off 4,378 to the nearest hundred.
12. Estimate the value of 49 × 21 by rounding each number to the nearest ten.
13. Simplify: \( (3^2 + 4^2) \div 5 \)
14. Arrange the following numbers in ascending order: 1/2, 0.3, 3/4, 0.25
15. Write the Roman numeral for 49.
16. Convert 86 into Roman numerals.
17. State the place value of 7 in the number 3,752.
18. Simplify: \( 2 + 3 \times 4 - 6 \div 3 \)
19. If set A = {2, 4, 6} and B = {4, 6, 8}, list: A ∪ B and A ∩ B
20. Write the number 0.125 as a fraction in its lowest terms.
21. Convert 2.75 into a mixed number.
22. Convert 3.5 hours into minutes.
23. State whether the following statements are true or false:
    • Zero is a natural number.
    • Every whole number is an integer.
    • All rational numbers are integers.