Class 8 Mathematics — Chapter 7: Comparing Quantities
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise Class 8 Mathematics Chapter 7, "Comparing Quantities", 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.
"Comparing Quantities" 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 Comparing Quantities, 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: Comparing Quantities (Class 8 Mathematics)
This chapter covers percentages, profit and loss, discount, taxes, and simple and compound interest.
- Percentage
- A ratio expressed out of 100; used to compare quantities and express increase or decrease.
- Profit, loss & discount
- Profit/loss is found on the cost price; discount is a reduction on the marked price.
- Sales tax / VAT / GST
- A tax added to the selling price, calculated as a percentage of it.
- Simple interest
- Interest calculated only on the original principal: SI = PRT/100.
- Compound interest
- Interest on the principal plus accumulated interest; the amount grows by A = P(1 + R/100)ⁿ.
Key formulas — Comparing Quantities
💡 Exam tips for Comparing Quantities
- Profit and loss percentages are always calculated on the cost price (CP), not the selling price.
- For half-yearly compounding, halve the rate and double the number of periods.
Sample questions
20% of 200:
0.20 × 200 = 40.
CI on ₹1000 at 10% p.a. for 2 years compounded annually:
Amount = 1000(1.1)² = 1210; CI = 210.
CP ₹400, SP ₹500. Profit %:
Profit = 100; %=100/400×100=25.
Comparing Quantities — FAQs
What are the key concepts in Class 8 Mathematics Comparing Quantities?+
This chapter covers percentages, profit and loss, discount, taxes, and simple and compound interest. Key ideas include Percentage, Profit, loss & discount, Sales tax / VAT / GST, Simple interest, Compound interest.
What does Class 8 Mathematics Chapter 7 (Comparing Quantities) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Comparing Quantities" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "Comparing Quantities" questions free to practise?+
Yes — sign in with Google to practise "Comparing Quantities" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Comparing Quantities" 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.
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