Class 8 Mathematics Chapter 2: Power Play — practice questions with answers
Free practice for Class 8 Mathematics, Chapter 2: Power Play. Try the solved questions below, then take a free test with instant marking and explanations.
49 questions11 easy, 27 medium, 11 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. A sheet 0.001 cm thick doubles in thickness with each fold. What is its thickness (cm) after 10 folds?
Show answer
Answer: 1.024 (± 0.001)
Why: 0.001 × 2¹⁰ = 1.024 cm. [p.20]
Why: 0.001 × 2¹⁰ = 1.024 cm. [p.20]
Q2. After any 3 folds, by how many times does the thickness increase?
- 8 times
- 3 times
- 6 times
- 9 times
Show answer
Answer: A. 8 times
Why: 2 × 2 × 2 = 8. [p.21]
Why: 2 × 2 × 2 = 8. [p.21]
Q3. Growth in which a quantity is multiplied by the same number again and again is called ______ growth.
Show answer
Answer: exponential
Why: Doubling each fold is exponential (multiplicative) growth. [p.21]
Why: Doubling each fold is exponential (multiplicative) growth. [p.21]
Q4. In 5⁴, which number is the base?
- 5
- 4
- 625
- 20
Show answer
Answer: A. 5
Why: 5 is the base and 4 is the exponent. [p.22]
Why: 5 is the base and 4 is the exponent. [p.22]
Q5. Find the value of 5⁴.
Show answer
Answer: 625 (± 0)
Why: 5 × 5 × 5 × 5 = 625. [p.22]
Why: 5 × 5 × 5 × 5 = 625. [p.22]
Q6. Simplify p⁴ × p⁶.
- p¹⁰
- p²⁴
- p²
- 2p¹⁰
Show answer
Answer: A. p¹⁰
Why: Add the exponents: 4 + 6 = 10. [p.24]
Why: Add the exponents: 4 + 6 = 10. [p.24]
Practise all 49 questions free
Timed test, marked instantly, with the correct answer and explanation for every question and a chapter-wise report.
Start the free testUnderstand it by doing
Try the interactive Maths Lab for Class 8.
Frequently asked questions
How many practice questions are there for Class 8 Mathematics Chapter 2: Power Play?
49 questions (11 easy, 27 medium, 11 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 8 Mathematics syllabus, used by CBSE and many state boards.