Algebra & Number Theory

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Algebra & Number Theory MCQ & Objective Questions

Algebra & Number Theory form a crucial part of the mathematics syllabus for students preparing for school exams and competitive tests in India. Mastering these topics not only enhances your problem-solving skills but also boosts your confidence in tackling objective questions. Practicing MCQs and important questions in this area can significantly improve your exam performance and help you secure better scores.

What You Will Practise Here

  • Fundamental concepts of algebra including variables, constants, and coefficients.
  • Linear equations and their applications in real-life scenarios.
  • Quadratic equations and methods to solve them, including factoring and the quadratic formula.
  • Understanding number systems, including integers, rational numbers, and irrational numbers.
  • Properties of numbers, including divisibility, prime numbers, and composite numbers.
  • Basic concepts of modular arithmetic and its applications in number theory.
  • Common algebraic identities and their usage in simplifying expressions.

Exam Relevance

Algebra & Number Theory are integral to the mathematics curriculum across various boards, including CBSE and State Boards. These topics frequently appear in competitive exams like NEET and JEE. Students can expect questions that test their understanding of concepts, application of formulas, and problem-solving abilities. Common question patterns include multiple-choice questions that require quick thinking and accurate calculations, making it essential to practice regularly.

Common Mistakes Students Make

  • Misinterpreting the question, leading to incorrect application of formulas.
  • Overlooking signs in equations, especially when solving linear and quadratic equations.
  • Confusion between different types of numbers, such as rational and irrational.
  • Neglecting to check for extraneous solutions in quadratic equations.
  • Failing to apply algebraic identities correctly in simplification problems.

FAQs

Question: What are some effective strategies for solving Algebra & Number Theory MCQs?
Answer: Focus on understanding concepts, practice regularly, and familiarize yourself with common question patterns. Time management during practice is also crucial.

Question: How can I improve my speed in solving objective questions in Algebra & Number Theory?
Answer: Regular practice of MCQs, timed quizzes, and reviewing mistakes can help improve your speed and accuracy.

Start your journey towards mastering Algebra & Number Theory today! Solve practice MCQs and test your understanding to excel in your exams. Remember, consistent practice is the key to success!

Q. If the HCF of two numbers is 15 and their LCM is 150, what is the product of the two numbers?
  • A. 225
  • B. 1500
  • C. 300
  • D. 75
Q. If the HCF of two numbers is equal to one of the numbers, what can be inferred?
  • A. The numbers are equal
  • B. One number is a multiple of the other
  • C. The numbers are coprime
  • D. The numbers are both prime
Q. If the LCM of two numbers is 120 and one of the numbers is 30, what is the other number?
  • A. 40
  • B. 60
  • C. 20
  • D. 10
Q. If the LCM of two numbers is 36 and their HCF is 6, what is the product of the two numbers?
  • A. 72
  • B. 108
  • C. 216
  • D. 144
Q. If the LCM of two numbers is 60 and their HCF is 5, what is the product of the two numbers?
  • A. 300
  • B. 600
  • C. 120
  • D. 150
Q. If the LCM of two numbers is 72 and one of the numbers is 8, what is the other number?
  • A. 9
  • B. 18
  • C. 36
  • D. 72
Q. If the LCM of two numbers is 84 and one of the numbers is 12, what is the other number?
  • A. 7
  • B. 21
  • C. 28
  • D. 14
Q. If the roots of the equation x^2 + px + q = 0 are 3 and -2, what is the value of p?
  • A. 1
  • B. 5
  • C. -1
  • D. -5
Q. If the roots of the equation x^2 - px + q = 0 are 3 and 4, what is the value of p?
  • A. 7
  • B. 12
  • C. 9
  • D. 10
Q. If x = 2^(3) and y = 2^(4), what is the value of x/y?
  • A. 1/2
  • B. 1/4
  • C. 2
  • D. 4
Q. If x = 2^(3/4), what is x^4?
  • A. 2
  • B. 4
  • C. 8
  • D. 16
Q. If x = √(25), what is the value of x^2?
  • A. 5
  • B. 10
  • C. 25
  • D. 0
Q. If x^2 + 4x + 4 = 0, what is the value of x?
  • A. -2
  • B. 2
  • C. 0
  • D. -4
Q. If x^2 - 5x + 6 = 0, what are the roots of the equation?
  • A. x = 1, 6
  • B. x = 2, 3
  • C. x = -2, -3
  • D. x = 0, 6
Q. If x^2 - 9 = 0, what are the values of x?
  • A. -3, 3
  • B. 0
  • C. 3
  • D. 9
Q. In modular arithmetic, what is 7 mod 3?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. Solve for x: 2x + 3 = 11
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. Solve for x: 3x^2 - 12 = 0.
  • A. x = 2
  • B. x = -2
  • C. x = 4
  • D. x = -4
Q. Solve for x: 4x^2 - 12x + 9 = 0.
  • A. x = 1
  • B. x = 3
  • C. x = 2
  • D. x = 4
Q. Solve for x: 4x^2 - 16 = 0.
  • A. x = 2
  • B. x = -2
  • C. x = 4
  • D. x = -4
Q. Solve for x: 5x^2 + 10x = 0.
  • A. x = 0, -2
  • B. x = 2, 0
  • C. x = -2, 2
  • D. x = 5, 0
Q. Solve for x: x^2 + 6x + 9 = 0.
  • A. x = -3
  • B. x = 3
  • C. x = 0
  • D. x = -9
Q. Solve for y: 3y + 4 = 19.
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. What are the roots of the equation x^2 - 5x + 6 = 0?
  • A. 1 and 6
  • B. 2 and 3
  • C. 3 and 4
  • D. 0 and 6
Q. What are the solutions to the equation x^2 + 2x - 8 = 0?
  • A. x = 2, -4
  • B. x = -2, 4
  • C. x = 4, -2
  • D. x = -4, 2
Q. What are the solutions to the equation x^2 + 4x + 4 = 0?
  • A. x = -2
  • B. x = 2
  • C. x = 0
  • D. x = -4
Q. What is the discriminant of the equation 2x^2 + 3x + 1 = 0?
  • A. 1
  • B. 0
  • C. -1
  • D. 2
Q. What is the discriminant of the equation 2x^2 - 4x + 2 = 0?
  • A. 0
  • B. 2
  • C. 4
  • D. 8
Q. What is the discriminant of the equation 3x^2 + 6x + 2 = 0?
  • A. 0
  • B. 2
  • C. 6
  • D. 12
Q. What is the HCF of 100 and 250?
  • A. 50
  • B. 25
  • C. 100
  • D. 10
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