Class 8 Mathematics — Chapter 2: Power Play
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise the most important Class 8 Mathematics questions from Chapter 2, "Power Play" — 72 NCERT-aligned multiple-choice questions with answers and explanations. The set is split into 24 Easy, 24 Medium and 24 Hard, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"Power Play" 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 (+4 correct, −1 wrong, 0 skipped), training the same negative-marking 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 Power Play, 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 sample question is shown below; sign in free to see its answer and practise all 72.
Key concepts: Power Play (Class 8 Mathematics)
This chapter turns repeated multiplication into short exponential notation and explores its power. You learn nᵃ (base and exponent), the laws that combine powers of the same base or the same exponent, what a zero or negative exponent means, and how powers of 10 let us write and compare huge and tiny numbers in scientific (standard) form. It also shows the difference between exponential (multiplicative) growth and linear (additive) growth.
- Exponential notation
- nᵃ means the base n multiplied by itself a times; a is the exponent (power). So 5⁴ = 5 × 5 × 5 × 5 = 625, where 5 is the base and 4 the exponent.
- Product law (same base)
- To multiply powers of the same base, keep the base and add the exponents: nᵃ × nᵇ = nᵃ⁺ᵇ. For example 2³ × 2⁴ = 2⁷.
- Quotient law (same base)
- To divide powers of the same base, keep the base and subtract the exponents: nᵃ ÷ nᵇ = nᵃ⁻ᵇ (n ≠ 0). For example 2⁷ ÷ 2³ = 2⁴.
- Power of a power
- Raising a power to another power multiplies the exponents: (nᵃ)ᵇ = nᵃᵇ. Because a × b = b × a, (2⁵)² and (2²)⁵ are both 2¹⁰.
Try a sample question
One free sample from this chapter — sign in to check your answer and practise the rest.
Using the laws of exponents, 2³ × 2⁴ equals:
Unlock the full chapter — free
See the answer and solution to this question, then practise all 72 questions (24 Easy · 24 Medium · 24 Hard) with timed scoring and instant feedback, plus the complete key-concept notes, formulas & exam tips. Sign in with Google — no card needed.
Start this chapter free →Power Play — FAQs
What are the key concepts in Class 8 Mathematics Power Play?+
This chapter turns repeated multiplication into short exponential notation and explores its power. You learn nᵃ (base and exponent), the laws that combine powers of the same base or the same exponent, what a zero or negative exponent means, and how powers of 10 let us write and compare huge and tiny numbers in scientific (standard) form. It also shows the difference between exponential (multiplicative) growth and linear (additive) growth. Key ideas include Exponential notation, Product law (same base), Quotient law (same base), Power of a power.
What does Class 8 Mathematics Chapter 2 (Power Play) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Power Play" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "Power Play" questions free to practise?+
Yes — sign in with Google to practise "Power Play" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Power Play" 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.
Are these "Power Play" MCQs available with answers?+
Yes. This page shows one sample question so you can see the format; sign in free with Google to reveal the correct option and a step-by-step "Why" explanation for it, then practise all 72 questions with instant scoring.
Is there negative marking in the "Power Play" quizzes?+
Yes — the timed quizzes use exam-grade marking: +4 for a correct answer, −1 for a wrong one and 0 for a skipped question, so you practise the same negative-marking discipline as CBSE Board exams.
Are these important questions for Power Play?+
The set is curated to the NCERT syllabus and weighted toward the question patterns that actually appear in CBSE Board exams, across Easy, Medium and Hard — so it doubles as an "important questions" revision list for "Power Play".