This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Mathematics > Number Systems > Class 9 Maths Chapter 1 Number Systems – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Maths Chapter 1 Number Systems Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Find the absolute value of 315 ft below sea level A) 315. B) -315. C) All the above. D) None of the above. Show Answer Correct Answer: A) 315. 2. Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together? A) 25 minutes. B) 60 minutes. C) 75 minutes. D) 55 minutes. Show Answer Correct Answer: C) 75 minutes. 3. Which of the following numbers is wrong? A) 61$_{2}$. B) 90$_{16}$. C) 53$_{8}$. D) 24$_{10}$. Show Answer Correct Answer: A) 61$_{2}$. 4. Identify the number system in the given number(Note-view the commas are inserted)5, 61, 341 A) International number system. B) Indian number system. C) All the above. D) None of the above. Show Answer Correct Answer: B) Indian number system. 5. Which number system do you use in your regular Math class? A) Decimal. B) Hexadecimal. C) Binary. D) Octal. Show Answer Correct Answer: A) Decimal. 6. True or False:$Z^-\cup W\subset Z$ A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 7. GCF of 20 and 35 A) 4. B) 5. C) 20. D) 7. Show Answer Correct Answer: B) 5. 8. Every rational number is A) A whole number. B) A natural number. C) A real number. D) An integer. Show Answer Correct Answer: C) A real number. 9. Which of the following statements is true about points graphed on anumber line oriented from left to right? A) -6 is located to the left of-5. B) -8 is located to the right of-2. C) -11 is located to the right of-8. D) -5 is located to the left of-8. Show Answer Correct Answer: A) -6 is located to the left of-5. 10. Express 0.777 ..... as a rational number. A) 7/10. B) 77/100. C) 7/99. D) 7/9. Show Answer Correct Answer: D) 7/9. 11. When a rational number is written as a decimal, the decimal is either ..... A) Positive or negative. B) Pi or not pi. C) Terminating or repeating. D) Really long or really short. Show Answer Correct Answer: C) Terminating or repeating. 12. The octal number (651.124)8 is equivalent to ..... A) $(1A9.2A)_{16}$. B) $\left(1A8.A3\right)_{16}$. C) $\left(1B0.B0\right)_{16}$. D) $\left(1B0.10\right)_{16}$. Show Answer Correct Answer: A) $(1A9.2A)_{16}$. 13. Evaluate 8.43-x for x=2.3 A) 1.6. B) 8.2. C) 6.13. D) 16. Show Answer Correct Answer: C) 6.13. 14. Rationalize and simplify:1/2 + 1 A) 2. B) 2-1/2-1. C) 2 + 1/2 + 1. D) 2-2. Show Answer Correct Answer: B) 2-1/2-1. 15. Ben and Ben went to meet up with Matt and Luke at BW3s. They spent $ 46.50 on 75 wings. How much was each wing before tax? A) 60 cents. B) 62 cents. C) 62 cents. D) 63 cents. Show Answer Correct Answer: B) 62 cents. 16. During a math class, PRATHAP is trying to remember the divisibility rule for 5. Can you help him? A) A number is divisible by 5 if its last digit is 2 or 3. B) A number is divisible by 5 if it is even. C) A number is divisible by 5 if its last digit is 0 or 5. D) A number is divisible by 5 if the sum of its digits is 5. Show Answer Correct Answer: C) A number is divisible by 5 if its last digit is 0 or 5. 17. Which of the following statements accurately describes the characteristics of real numbers? A) Real numbers can only be positive. B) Real numbers encompass both rational and irrational numbers, and they can be represented on a number line. C) Real numbers are exclusively fractions. D) Real numbers do not include decimals. Show Answer Correct Answer: B) Real numbers encompass both rational and irrational numbers, and they can be represented on a number line. 18. What is the octal equivalent of the binary number 101001$_{2}$? A) 54$_{8}$. B) 53$_{8}$. C) 51$_{8}$. D) 52$_{8}$. Show Answer Correct Answer: C) 51$_{8}$. 19. How do you write this number using words?7, 32, 405 A) Seven lakhs, thirty two, thousand, four hundred fifty. B) Seven lakhs, thirty two thousand, four hundred and fifty. C) Seven lakhs, thirty two thousand, four hundred five. D) Seven lakhs, thirty two thousand, forty. Show Answer Correct Answer: C) Seven lakhs, thirty two thousand, four hundred five. 20. What axiom justifies the following statement? $a\times\left(b+c\right)=\left(a\times b\right)+\left(a\times c\right)$ A) Associativity. B) Commutativity. C) Distributivity. D) Closure. Show Answer Correct Answer: C) Distributivity. 21. What is the distance between (4, -6) and (4, 2) A) 8. B) 6. C) 0. D) 4. Show Answer Correct Answer: A) 8. 22. A team of runners is needed to run a $^{1}$/$_{4}$ mile relay race . If each runner must run $^{1}$/$_{16}$ mile. How many runners do they need to run the race? A) 4. B) 1/64. C) 2. D) 5. Show Answer Correct Answer: A) 4. 23. Which of the following expressions represents a positive number? A) -3/4-(-2/3). B) -4.5-(-5). C) -1/8 + (-5/8). D) 6.1 + (-6.2). Show Answer Correct Answer: B) -4.5-(-5). 24. 9's complement of 25 is A) 84. B) 74. C) 94. D) 64. Show Answer Correct Answer: B) 74. 25. The sum of 11101 + 10111 equals ..... A) 110100. B) 100001. C) 110011. D) 100100. Show Answer Correct Answer: A) 110100. 26. Name the number system that best describes the situation.Time you spend at school. A) Whole Numbers. B) Real Numbers. C) Irrational Numbers. D) Integers. E) Rational Numbers. Show Answer Correct Answer: B) Real Numbers. 27. 6 ones, 3 hundreds, 6 thousands, 7 ten thousands, and 2 lakhs is ..... A) 2, 76, 306. B) 8, 53, 672. C) All the above. D) None of the above. Show Answer Correct Answer: A) 2, 76, 306. 28. Find the HCF of 48 and 64. A) 16. B) 24. C) 8. D) 12. Show Answer Correct Answer: A) 16. 29. Prathap and Asher have 24 and 36 apples respectively. Find the HCF of their apples. A) 24. B) 6. C) 12. D) 18. Show Answer Correct Answer: C) 12. 30. 10's complement of 25 is A) 85. B) 65. C) 95. D) 75. Show Answer Correct Answer: D) 75. 31. To which category does-6 belong? A) Integer Only. B) Integer and Whole #. C) Integer and Rational #. D) Whole #. Show Answer Correct Answer: C) Integer and Rational #. 32. In Mr. Snarey's class 8 out of 25 students are boys. What percentage of the class are GIRLS? A) 17%. B) 8%. C) 68%. D) 32%. Show Answer Correct Answer: C) 68%. 33. Rationalize the denominator of the expression. Assume that all variables are positive. $\frac{15\sqrt{60x^5}}{3\sqrt{12x}}$ A) $10x^2\sqrt{5}$. B) $5x^2\sqrt{5}$. C) $5x\sqrt{10}$. D) None of the above. Show Answer Correct Answer: B) $5x^2\sqrt{5}$. 34. Find the square root of 0.04. A) 0.04. B) 2. C) 0.4. D) 0.2. Show Answer Correct Answer: D) 0.2. 35. Which of the follwing is irrational? A) $0.14\overline{16}$. B) 0.40140014000014 . C) 0.14. D) $0.\overline{1416}$. Show Answer Correct Answer: B) 0.40140014000014 . 36. What is the GCF (Greatest Common Factor) of 12 and 6? A) 1. B) 3. C) 2. D) 6. Show Answer Correct Answer: D) 6. 37. There are ..... rational numbers between any two rational numbers. A) None. B) One. C) Two. D) Infinite. Show Answer Correct Answer: D) Infinite. 38. The binary addition 1 + 1 + 1 gives A) 110. B) 111. C) 10. D) 11. Show Answer Correct Answer: D) 11. 39. To which category does the number 4 belong? A) Rational # Only. B) Whole # Only. C) Integer Only. D) All of These. Show Answer Correct Answer: D) All of These. 40. Find the value of $\left(256\right)^{0.16\\}\times\left(256\right)^{0.09}$ A) 16. B) 64. C) 4. D) 256.25. Show Answer Correct Answer: C) 4. 41. The sum of a rational and an irrational number is: A) Always rational. B) Always irrational. C) Rational or irrational. D) None of these. Show Answer Correct Answer: B) Always irrational. 42. What is the product of 5.2 and 0.25? A) 1.4. B) 13.4. C) 1.3. D) 5.45. Show Answer Correct Answer: C) 1.3. 43. To which category does-2/5 belong? A) Rational # Only. B) Whole # Only. C) Integer Only. D) Integer & Rational. Show Answer Correct Answer: A) Rational # Only. 44. Simplify $\sqrt{125}\\times\sqrt{5}$ A) 50. B) 25. C) 35. D) 5. Show Answer Correct Answer: B) 25. 45. The elevation of the Salton Sea in California is given as-227 ft. What does this mean? A) 227 ft below sea level. B) 227 ft above sea level. C) -227 ft below sea level. D) -227 ft above sea level. Show Answer Correct Answer: A) 227 ft below sea level. 46. What is the sum of 2/3 and 1/4? A) 3/4. B) 7/12. C) 11/12. D) 5/12. Show Answer Correct Answer: C) 11/12. 47. Convert the following Gray code to Binary1010 A) 0100. B) 1100. C) 1010. D) 1011. Show Answer Correct Answer: B) 1100. 48. What is the base of the decimal number system? A) 16. B) 8. C) 10. D) 2. Show Answer Correct Answer: C) 10. 49. The Base of the hexadecimal number systems is A) 16. B) 2. C) 6. D) 8. Show Answer Correct Answer: A) 16. 50. The binary equivalent of 13 is A) 1101. B) 1110. C) 1000. D) 1001. Show Answer Correct Answer: A) 1101. 51. Devon had his two friends over for pizza. Devon ate 1/4 of the pizza. One of his friends ate 3/8 of the pizza and the other friend ate 1/8 of the pizza. How much of the pizza is left? A) 1/5. B) 1/3. C) 1/4. D) 1/8. Show Answer Correct Answer: C) 1/4. 52. Subtract:5/6-1/3. A) 1/2. B) 1/3. C) 2/3. D) 3/6. Show Answer Correct Answer: A) 1/2. 53. The radix of Binary number system is A) 9. B) 3. C) 2. D) 1. Show Answer Correct Answer: C) 2. 54. At Kentucky Fried Chicken, the kitchen staff baked 96 chicken legs, 144 thighs, and 224 wings. The staff had to prepare platters for a catered lunch at an office. Each platter will have the same number of legs, thighs, and wings. How many platters can the staff make if they want the greatest number of chicken pieces on each platter? A) Greatest Common Factor. B) Least Common Multiple. C) All the above. D) None of the above. Show Answer Correct Answer: A) Greatest Common Factor. 55. Octal number system uses digits from 0-8 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. The height of a volcano is approximately 33, 000 ftof which 17, 976 feet isabove sea level. The rest of the volcano is below sea level. Which integerrepresents the elevation of the volcano below sea level? A) +15, 024 ft. B) -17, 976 ft. C) +17, 976 ft. D) -15, 024 ft. Show Answer Correct Answer: D) -15, 024 ft. 57. The product of any two irrational numbers is A) Sometimes rational, sometimes irrational. B) Always a rational number. C) Always an irrational number. D) Always an integer. Show Answer Correct Answer: A) Sometimes rational, sometimes irrational. 58. GOKUL and ASHER are playing a game where they need to find numbers that are divisible by both 2 and 3. If they find such a number, what other number must it also be divisible by? A) 12. B) 9. C) 4. D) 6. Show Answer Correct Answer: D) 6. 59. Benil and David are trying to find the HCF of 30 and 45 for their math project. A) 10. B) 15. C) 20. D) 5. Show Answer Correct Answer: B) 15. 60. What is the product of the HCF and LCM of two numbers? A) The product of the HCF and LCM is the sum of the two numbers. B) The product of the HCF and LCM is equal to the difference of the two numbers. C) The product of the HCF and LCM of two numbers is equal to the product of the two numbers. D) The product of the HCF and LCM is always greater than the larger number. Show Answer Correct Answer: C) The product of the HCF and LCM of two numbers is equal to the product of the two numbers. ← PreviousNext →Related 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 4Class 9 Maths Chapter 1 Number Systems Quiz 5Class 9 Maths Chapter 1 Number Systems Quiz 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books