Class 8 Maths Chapter 1 (Rational Numbers) MCQs are provided here online for students. These questions are prepared as per CBSE board syllabus (2020-2021) and NCERT guidelines. The chapter-wise objective questions are given for students to make them understand each concept and help to score good marks in exams. Also, learn important questions for class 8 Maths here at BYJU’S.
MCQs on Class 8 Rational Numbers
Multiple choice questions are available for Class 8 Rational numbers with each question consisting of four answers, out of which one is correct. Students have to solve the question and choose the correct answer. They can also check their solutions here.
1. An integer can be:
A. Only Positive
B. Only Negative
C. Both positive and negative
D. None of the above
Answer: C
Explanation: An integer can be both positive and negative as well as zero.
i.e. …-3, -2, -1, 0, 1, 2, 3,….
2. A rational number can be represented in the form of:
A. p/q
B. pq
C. p+q
D. p-q
Answer: A
Explanation: A rational number can be represented in the form p/q where p and q are integers and q is not equal to zero.
3. The value of ½ x ⅗ is equal to:
A. ½
B. 3/10
C. ⅗
D. ⅖
Answer: B
Explanation: ½ x ⅗ = (1 x 3)/(2 x 5) = 3/10
4. The value of (½) ÷ (⅗) is equal to:
A. 3/10
B. ⅗
C. 6/5
D. ⅚
Answer: D
Explanation: (½) ÷ (⅗) = (½) x (5/3) = (1 x 5)/(2 x 3) = ⅚
5. The value of ½ + ¼ is equal to:
A. ¾
B. 3/2
C. ⅔
D. 1
Answer: A
Explanation: ½ + ¼
Making the denominator equal:
2/4 + ¼ = (2 + 1)/4 = ¾
6. The value of (5/4) – (8/3) is:
A. 17/12
B. -17/12
C. 12/17
D. -12/17
Answer: B
Explanation: 5/4 – 8/3
Making the denominator equal:
[(5/4) x (3/3)] – [(8/3) x (4/4)]= (15/12) – (32/12)
= (15 – 32)/12
= -17/12
7. The associative property is applicable to:
A. Addition and subtraction
B. Multiplication and division
C. Addition and Multiplication
D. Subtraction and Division
Answer: C
Explanation: As per associative property:
A + (B + C) = (A + B) + C
A × (B × C) = (A × B) × C
8. The value of (-10/3) x (-15/2) x (17/19) x 0 is:
A. 0
B. 22.66
C. 20
D. 35
Answer: A
Explanation: Any number multiplied by zero is equal to zero.
9. The additive identity of rational numbers is:
A. 0
B. 1
C. 2
D. -1
Answer: A
Explanation: Any number added to zero is equal to the number itself.
Ex: 5+0 = 5
Therefore, 0 is the additive identity of rational numbers.
10. The multiplicative identity of rational numbers is:
A. 0
B. 1
C. 2
D. -1
Answer: B
Explanation: Any number multiplied by 1 is equal to the number itself
Ex: 5 x 1 = 5
Therefore, 1 is the multiplicative identity of rational numbers.
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