This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Maths Chapter 1 Number Systems – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Maths Chapter 1 Number Systems Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the ages of a mother and daughter are in the ratio 7:3 and the mother is 42, how old is the daughter? A) 18. B) 12. C) 14. D) 21. Show Answer Correct Answer: A) 18. 2. Perform binary addition:101101 + 011011 =? A) 011010. B) 1010100. C) 101110. D) 1001000. Show Answer Correct Answer: D) 1001000. 3. The Thomas Jefferson Memorial is on 18.36 acres of land and the Franklin Roosevelt Memorial is on 7.5 acres of land. How many more acres does the Jefferson Memorial have than the Roosevelt Memorial? A) 9.86 acres. B) 10.86 acres. C) 11.31 acres. D) 17.61 acres. Show Answer Correct Answer: B) 10.86 acres. 4. Convert the binary number 1100 to Gray code. A) 0011. B) 1010. C) 1100. D) 1001. Show Answer Correct Answer: B) 1010. 5. The number obtained on rationalising the denominator of $\frac{1}{\sqrt{7}-2}$ A) $\frac{\sqrt{7}+2}{3}$. B) $\frac{\sqrt{7}-2}{3}$. C) $\frac{\sqrt{7}+2}{5}$. D) $\frac{\sqrt{7}+2}{45}$. Show Answer Correct Answer: A) $\frac{\sqrt{7}+2}{3}$. 6. To which category does the number 8 belong? A) Whole # Only. B) All of These. C) Rational # Only. D) Integer Only. Show Answer Correct Answer: B) All of These. 7. PRATHAP, ASHER, and NITHIN are trying to find the HCF of the numbers they collected from their project:45, 60, and 75. A) 25. B) 20. C) 15. D) 10. Show Answer Correct Answer: C) 15. 8. Which of the following numbers is irrational? A) 0.101001000100001 . B) 0.333 . C) 0.123123123 . D) 22/7. Show Answer Correct Answer: A) 0.101001000100001 . 9. Which of the following is not a part of the set of rational numbers? A) -42. B) 5/0. C) 0. D) 14.7. Show Answer Correct Answer: B) 5/0. 10. Name the number system that best describes the situation.Number of instagram followers. A) Natural Numbers. B) Whole Numbers. C) Integers. D) Rational Numbers. E) Real Numbers. Show Answer Correct Answer: B) Whole Numbers. 11. Mrs. Sheehan took Griffin to the pet store with an allowance of $ 56.00. If he purchased 16.52 pounds of dog treats with his allowance, what was the cost per pound? A) 29 Cents. B) 30 Cents. C) 28 Cents. D) 27 cents. Show Answer Correct Answer: B) 30 Cents. 12. Convert binary to octal:$\left(110110001010\right)_2$ A) $\left(5512\right)_8$. B) $\left(6612\right)_8$. C) $\left(4532\right)_8$. D) $\left(6745\right)_8$. Show Answer Correct Answer: B) $\left(6612\right)_8$. 13. If the decimal number is a fraction then its binary equivalent is obtained by ..... the number continuously by 2. A) Dividing. B) Multiplying. C) Adding. D) Subtracting. Show Answer Correct Answer: B) Multiplying. 14. What is the additive inverse of $7$ $Z_{16}$ A) -7. B) 9. C) $\frac{1}{7}$. D) 8. Show Answer Correct Answer: B) 9. 15. What is the decimal expansion of 1/3? A) 0.3. B) 0.333 . C) 0.333. D) 0.33333. Show Answer Correct Answer: B) 0.333 . 16. To which category does-3.4 belong? A) Whole # Only. B) Integer Only. C) Rational # Only. D) Integer & Rational # Only. Show Answer Correct Answer: C) Rational # Only. 17. Nik brought a bag of candy to school. He started with 50 pieces, but gave out 15 pieces to EACH of his TWO friends. His nice math teacher gave Nik 3 pieces of candy. How much does he have now? A) 37 pieces. B) 10 pieces. C) 0 pieces. D) 23 pieces. Show Answer Correct Answer: D) 23 pieces. 18. To which category does-6.4 belong? A) Whole #. B) Integer. C) Rational #. D) Integer & Rational. Show Answer Correct Answer: C) Rational #. 19. John and David are siblings whose ages are in the ratio 3:4. If David, the older sibling, is 28 years old, how old is John? A) 18. B) 21. C) 30. D) 24. Show Answer Correct Answer: B) 21. 20. The product of $\sqrt{576}$ $\sqrt{684}$ A) Irrational because both factors are irrational. B) Rational because both factors are rational. C) Irrational because one factor is irrational. D) Rational because one factor is rational. Show Answer Correct Answer: C) Irrational because one factor is irrational. 21. Calculate the LCM of 12 and 18. A) 36. B) 54. C) 24. D) 30. Show Answer Correct Answer: A) 36. 22. Which of the following can logically be an octal number? A) 8. B) 16. C) 9. D) 18. Show Answer Correct Answer: B) 16. 23. Check all classifications for the number:$\frac{1}{2}$ A) Natural Number. B) Whole Number. C) Integers. D) Rational Number. E) Irrational Number. Show Answer Correct Answer: D) Rational Number. 24. Find the absolute value of-99 A) -99. B) 99. C) All the above. D) None of the above. Show Answer Correct Answer: B) 99. 25. Ones complement of 10101 A) 01010. B) 11100. C) 10100. D) 01011. Show Answer Correct Answer: A) 01010. ← PreviousNext →Related QuizzesClass 9 Maths Chapter 1 Number Systems Quiz 1Class 9 Maths Chapter 1 Number Systems Quiz 2Class 9 Maths Chapter 1 Number Systems Quiz 3Class 9 Maths Chapter 1 Number Systems Quiz 4Class 9 Maths Chapter 1 Number Systems Quiz 5Class 9 Maths Chapter 1 Number Systems Quiz 6Class 9 Maths Chapter 1 Number Systems Quiz 7Class 9 Maths Chapter 1 Number Systems Quiz 8Class 9 Maths Chapter 1 Number Systems Quiz 10Class 9 Maths Chapter 1 Number Systems Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books