Class 8 Maths – Chapter 13
Direct and Inverse Proportions
STEP 7: MCQs with Answers
Direct and Inverse Proportions
STEP 7: MCQs with Answers
🔹 Multiple Choice Questions
-
Two quantities are in direct proportion if:
A) One increases, other decreases
B) Both increase or decrease together
C) Their product is constant
D) Their sum is constant
Answer: B -
If x ∝ y, then:
A) x/y = constant
B) xy = constant
C) x + y = constant
D) x − y = constant
Answer: A -
Speed and time are examples of:
A) Direct proportion
B) Inverse proportion
C) No proportion
D) Constant proportion
Answer: B -
If 6 pens cost ₹30, what is the cost of 10 pens?
A) ₹40
B) ₹45
C) ₹50
D) ₹60
Answer: C -
If 12 workers take 15 days to complete a work, how many days will 20 workers take?
A) 9
B) 10
C) 12
D) 15
Answer: B -
Which of the following is an inverse proportion?
A) Distance and time (same speed)
B) Cost and number of items
C) Speed and time (same distance)
D) Length and breadth of a rectangle
Answer: C -
If x ∝ 1/y, then:
A) x/y = constant
B) xy = constant
C) x − y = constant
D) x + y = constant
Answer: B -
Which situation shows direct proportion?
A) More workers, less days
B) More speed, less time
C) More items, more cost
D) More pipes, less time
Answer: C
📌 Exam Tip:
• Identify the type of proportion first
• Use correct formula
• MCQs are easy scoring – don’t skip them
• Identify the type of proportion first
• Use correct formula
• MCQs are easy scoring – don’t skip them
📘 Class 8 Mathematics – Complete Library
CBSE | NCERT | State Syllabus
Chapter 1: Rational Numbers
Chapter 2: Linear Equations in One Variable
Chapter 3: Understanding Quadrilaterals
Chapter 4: Practical Geometry
Chapter 5: Data Handling
Chapter 6: Squares and Square Roots
Chapter 7: Cubes and Cube Roots
- NCERT Notes
- MCQs
- Worksheet
- Worksheet Answers
- Mind Map & Easy Tricks
- Important Exam Questions
- Very Important Questions
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