Class 8 Mathematics MCQ Rational Numbers

Question : What is the additive inverse of -2/3?
(a) 0
(b) 1
(c) 2/3
(d) -2/3

Question : (a + b) + c = a + (b + c) is called
(a) commutative law for multiplication
(b) commutative law for addition
(c) associative law for addition
id) associative law for multiplication.

Question : The multiplicative inverse of 1/2 is
(a) 1
(b) -1
(c) 2
(d) 0

Question :Which of the following forms a pair of equivalent rational numbers?
(a) $\frac { 24 }{ 40 }$ and $\frac { 35 }{ 50 }$
(b) $\frac { -25 }{ 35 }$ and $\frac { 55 }{ -77 }$
(c) $\frac { -8 }{ 15 }$ and $\frac { -24 }{ 48 }$
(d) $\frac { 9 }{ 72 }$ and $\frac { -3 }{ 21 }$

Question :Which number is in the middle if $\frac { -1 }{ 6 }$, $\frac { 4 }{ 9 }$, $\frac { 6 }{ -7 }$, $\frac { 2 }{ 5 }$ and $\frac { -3 }{ 4 }$ arranged in descending order?
(a) $\frac { 2 }{ 5 }$
(b) $\frac { 4 }{ 9 }$
(c) $\frac { -1 }{ 6 }$
(d) $\frac { -6 }{ 7 }$

Question :Find the multiplicative inverse of -13.
(a) 13
(b) -13
(c) $\frac { -1 }{ 13 }$
(d) 12

Question :Which of the following statements is true?
(a) Every fraction is a rational number.
(b) Every rational number is a fraction.
(c) Every integer is a rational number.
(d) Both (a) and (c).

Question : The multiplicative identity of rational numbers is:
(a) 0
(b) 1
(c) 2
(d) -1

Question : Which of the following statements is false ?
(a) Natural numbers are closed under subtraction
(b) Whole numbers are not closed under subtraction
(c) Integers are closed under subtraction
(d) Rational numbers are closed under subtraction.

Question : A rational number can be represented in the form of:
(a) p/q
(b) pq
(c) p+q
(d) p-q

Question : Which of the following statements is true?
(a) Natural numbers are closed under division.
(b) Whole numbers are not closed under division.
(c) Integers are closed under division.
(d) Rational numbers are closed under division.

Question : Which of the following statements is true?
(a) Every fraction is a rational number.
(b) Every rational number is a fraction.
(c) Every integer is a rational number.
(d) Both (i) and (iii).

Question :Which of the following is the identity element under addition?
(a) 1
(b) -1
(c) 0
(d) None of these

Question :What is the additive inverse of $\frac { -2 }{ 3 }$?
(a) 0
(b) 1
(c) $\frac { 2 }{ 3 }$
(d) $\frac { -2 }{ 3 }$

Question :Write the additive inverse of $\frac { 4 }{ 5 }$.
(a) 1
(b) $\frac {-4 }{ 5 }$
(c) $\frac { 4 }{ 5 }$
(d) 0

Question :Which among the following is a rational number equivalent to $\frac { -5 }{ -3 }$ ?
(a) $\frac { -25 }{ 15 }$
(b) $\frac { 25 }{ -15 }$
(c) $\frac { 25 }{ 15 }$
(d) $\frac { -25 }{ 30 }$

Question :Which of the following is the reciprocal of the reciprocal of a rational number?
(a) -1
(b) 1
(c) 0
(d) The number itself

Question :How is $\frac { -28 }{ 84 }$ expressed as a rational number with numerator 4?
(a) $\frac { 4 }{ 7 }$
(b) $\frac { -4 }{ 12 }$
(c) $\frac { 4 }{ 12 }$
(d) $\frac { 4 }{ -7 }$

Question :The value of $\frac { 1 }{ 2 }$ × $\frac { 3 }{ 5 }$ is equal to:
(a) $\frac { 1 }{ 2 }$
(b) $\frac { 3 }{ 10 }$
(c) $\frac { 3 }{ 5 }$
(d) $\frac { 2 }{ 5 }$

Question :What should be subtracted from $\frac { -7 }{ 11 }$ to get −2?
(a) $\frac { 15 }{ 11 }$
(b) $\frac { -15 }{ 11 }$
(c) $\frac { 29 }{ 11 }$
(d) $\frac { -29 }{ 11 }$

Question :A number which can be written in the form, p/q where p and q are integers and _____ is called a rational number.
(a) q = 0
(b) q ≠ 0
(c) q = 1
(d) none of these

Question :The value of $\frac { 1 }{ 2 }$ + $\frac { 1 }{ 4 }$ is equal to:
(a) $\frac { 3 }{ 4 }$
(b) $\frac { 3 }{ 2 }$
(c) $\frac { 2 }{ 3 }$
(d) 1

Question :Which of the following is the Multiplicative identity for rational numbers?
(a) 1
(b) -1
(c) 0
(d) None of these

Question :________ is not associative for rational numbers.
(a) Subtraction or Division
(b) Addition or Multiplication
(c) Addition or Division
(d) Multiplication or Division

Question :Which of the following is the Multiplicative identity for rational numbers?
(a) 1
(b) -1
(c) 0
(d) None of these