This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Mathematics > Number Systems > Class 9 Maths Chapter 1 Number Systems – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Maths Chapter 1 Number Systems Quiz 6 (35 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. To which category does the number 1.6 belong? A) Whole # Only. B) Rational # Only. C) Whole # & Integer. D) Integer Only. Show Answer Correct Answer: B) Rational # Only. 2. Convert the binary number 1011 to decimal. A) 10. B) 14. C) 12. D) 11. Show Answer Correct Answer: D) 11. 3. The temperature drops 2 degrees per hour for 3 hours. Which of the following expressions does NOT describe the change in temperature? A) (2)(3). B) -2-2-2. C) (-2) + (-2) + (-2). D) -2(3). Show Answer Correct Answer: A) (2)(3). 4. Numbers like-3, -2, -1, 0, 1, 2, 3 are called is what type of number (click all the correct answers)? A) Integers. B) Natural numbers. C) Whole numbers. D) Rational numbers. Show Answer Correct Answer: A) Integers. 5. Which of the following is not always true? A) The sum of two rational numbers is rational. B) The product of two irrational numbers is rational. C) The sum of an irrational number and a rational number is irrational. D) The product of a nonzero rational number and an irrational number is irrational. Show Answer Correct Answer: B) The product of two irrational numbers is rational. 6. The 2 sub-sets of all Real Numbers are ..... A) Whole and counting. B) Integers and fractions. C) Positive and negative. D) Rational and irrational. Show Answer Correct Answer: D) Rational and irrational. 7. You cannot perform arithmetic operations on binary numbers A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. Name the number system that best describes the situation.Shoe size. A) Rational Numbers. B) Integers. C) Real Numbers. D) Whole Numbers. E) Irrational Numbers. Show Answer Correct Answer: A) Rational Numbers. 9. 1 multiplied by 0 is equal to 0 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. The radix of Hexadecimal number system is A) 6. B) 14. C) 16. D) 9. Show Answer Correct Answer: C) 16. 11. What is the number system the computer can understand? A) Binary. B) Hexadecimal. C) Octal. D) Decimal. Show Answer Correct Answer: A) Binary. 12. After rationalising the denominator of $\frac{7}{3\sqrt{3}-2\sqrt{2}}$ A) 5. B) 35. C) 13. D) 19. Show Answer Correct Answer: D) 19. 13. When converting binary to octal, in how many digits should the binary number be separated by? A) Three (3). B) Two (2). C) Four (4). D) One (1). Show Answer Correct Answer: A) Three (3). 14. Which out of the following Binary numbers is equivalent to decimal number 24 A) 11111. B) 101010. C) 00010. D) 11000. Show Answer Correct Answer: D) 11000. 15. The 2's complement of 11100111 is ..... A) 00011010. B) 11100110. C) 00011001. D) 00011000. Show Answer Correct Answer: C) 00011001. 16. Calculate $\frac{2}{3}-\left(-\frac{4}{3}\right)$ A) 3. B) $-\frac{2}{3}$. C) 2. D) -2. Show Answer Correct Answer: C) 2. 17. The number of digits required to represent a decimal number 31 in equivalent binary form are A) 5. B) 2. C) 3. D) 6. E) 4. Show Answer Correct Answer: A) 5. 18. Find the sum. 5.26 + 36.4 + 7 A) 48.66. B) 42.6. C) 41.73. D) 89.7. Show Answer Correct Answer: A) 48.66. 19. Convert the following octal number to decimal.17 A) 57. B) 82. C) 15. D) 51. Show Answer Correct Answer: C) 15. 20. Octal to binary conversion:$\left(24\right)_8$ A) $\left(010100\right)_2$. B) $\left(101010\right)_2$. C) $\left(111101\right)_2$. D) $\left(111100\right)_2$. Show Answer Correct Answer: A) $\left(010100\right)_2$. 21. What is 4/7 as a decimal? A) 0.47. B) 0.57. C) 0.74. D) 0.7. Show Answer Correct Answer: B) 0.57. 22. What is 1001 + 1010 + 0110 as a Denary (Base 10) number? A) 22. B) 24. C) 25. D) 23. Show Answer Correct Answer: C) 25. 23. Jenny goes to karate class every 12 days.and too the library every 18 days. On December 1st she went to both class and the library. On what date will she do both class and go to the library? A) 36 days. B) 52 days. C) 24 days. D) 42 days. Show Answer Correct Answer: A) 36 days. 24. The decimal expansion of the number is $\sqrt{2}$ A) 1.41421. B) Non-terminating non-recurring. C) Non-terminating recurring. D) A finite decimal. Show Answer Correct Answer: B) Non-terminating non-recurring. 25. -4.7 x 3.2-(-.77) A) -14.27. B) -15.04. C) 15.81. D) -15.81. Show Answer Correct Answer: A) -14.27. 26. The 1's complement of 10011101 is ..... A) 01100011. B) 10011110. C) 01100010. D) 01100001. Show Answer Correct Answer: C) 01100010. 27. A square wall has an area of 87.5 square feet. Which best represents the length of the wall? A) 43.75 feet. B) 9.4 feet. C) 7656 feet. D) 21.9 feet. Show Answer Correct Answer: B) 9.4 feet. 28. Hex equivalent of 10001101 A) 8E. B) 97. C) 86. D) 8D. Show Answer Correct Answer: D) 8D. 29. Which is an example of the commutative property of multiplication? A) 2(3) = 2(4). B) 2 x 2 = 4 x 1. C) 4 x (1 x 2) = (4 x 1) x 2. D) 3 x 4 = 4 x 3. Show Answer Correct Answer: D) 3 x 4 = 4 x 3. 30. What would the highest single number be in Oct? A) 0. B) 9. C) 7. D) 8. Show Answer Correct Answer: C) 7. 31. Convert! 1001 in to Denary (Base 10). A) 23. B) 8. C) 9. D) 5. Show Answer Correct Answer: C) 9. 32. Express the decimal number-37 as an 8-bit number in sign-magnitude. A) 00100101. B) 11011000. C) 10100101. D) 11010001. Show Answer Correct Answer: C) 10100101. 33. GOKUL and DAVID are sharing a pizza. GOKUL eats 3/4 of the pizza while DAVID eats 2/5 of the pizza. How much pizza did they eat in total? A) 1/2. B) 23/20. C) 9/10. D) 7/20. Show Answer Correct Answer: B) 23/20. 34. The largest two digit hexadecimal number is ..... A) $\left(FD\right)_{16}$. B) $\left(EF\right)_{16}$. C) $\left(FE\right)_{16}$. D) $\left(FF\right)_{16}$. Show Answer Correct Answer: D) $\left(FF\right)_{16}$. 35. Determine if the product of $3\sqrt{2}$ $8\sqrt{18}$ A) Rational. B) Irrational. C) All the above. D) None of the above. Show Answer Correct Answer: A) Rational. ← PreviousRelated QuizzesMathematics QuizzesClass 9 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 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books