Class 8 Mathematics — Chapter 10: Exponents and Powers
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise Class 8 Mathematics Chapter 10, "Exponents and Powers", with 72 NCERT-aligned multiple-choice questions. The set is split into 24 Easy, 24 Medium and 24 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"Exponents and Powers" is one of the chapters where problem-solving speed, formula recall and step-by-step reasoning really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Exponents and Powers, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 8 Mathematics mastery score. A few sample questions are shown below; sign in free to practise all 72.
Key concepts: Exponents and Powers (Class 8 Mathematics)
This chapter extends exponents to negative powers, develops the laws of exponents, and uses them with standard (scientific) notation.
- Negative exponents
- a⁻ⁿ = 1/aⁿ; a negative power means the reciprocal.
- Laws of exponents
- aᵐ × aⁿ = aᵐ⁺ⁿ, aᵐ ÷ aⁿ = aᵐ⁻ⁿ, (aᵐ)ⁿ = aᵐⁿ, and a⁰ = 1.
- Power of a product/quotient
- (ab)ⁿ = aⁿbⁿ and (a/b)ⁿ = aⁿ/bⁿ.
- Standard form
- Very large or very small numbers are written as k × 10ⁿ with 1 ≤ k < 10.
- Comparing magnitudes
- Standard form makes it easy to compare extremely large and small quantities.
Key formulas — Exponents and Powers
💡 Exam tips for Exponents and Powers
- Any non-zero number raised to the power 0 equals 1.
- In standard form k × 10ⁿ, the coefficient k must satisfy 1 ≤ k < 10.
Sample questions
Value of 10⁻¹ is:
10⁻¹ = 1/10¹ = 1/10.
2⁻³ =
a⁻ⁿ = 1/aⁿ.
aᵐ ÷ aⁿ =
Subtract powers.
Exponents and Powers — FAQs
What are the key concepts in Class 8 Mathematics Exponents and Powers?+
This chapter extends exponents to negative powers, develops the laws of exponents, and uses them with standard (scientific) notation. Key ideas include Negative exponents, Laws of exponents, Power of a product/quotient, Standard form, Comparing magnitudes.
What does Class 8 Mathematics Chapter 10 (Exponents and Powers) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Exponents and Powers" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "Exponents and Powers" questions free to practise?+
Yes — sign in with Google to practise "Exponents and Powers" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Exponents and Powers" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 72 questions free
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