Comparing Quantities — Class 8 MCQs with Answers
Class 8 CBSE Mathematics · Chapter 107
Pre-2026 syllabusThis chapter is from the older NCERT book. See the 2026-27 Class 8 Mathematics chapters →
72 practice questions · 24 Easy · 24 Medium · 24 Hard · Updated
Practise the most important Class 8 CBSE Mathematics questions from Chapter 107, "Comparing Quantities". You get 9 timed quizzes made from 72 NCERT-based MCQs, with answers and explanations. The questions are split into 24 Easy, 24 Medium and 24 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE Board exams apart.
To score well in "Comparing Quantities", focus on fast problem-solving, formula recall and step-by-step working. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Comparing Quantities, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 8 Mathematics mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
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.
Comparing Quantities — important questions & MCQs with answers (Class 8 Mathematics)
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 58 are timed and scored when you sign in.
- Q1Easy
20% of 200:
A.100B.20C.40✓ CorrectD.50Answer: C. 40
Explanation: 0.20 × 200 = 40.
- Q2Easy
Simple interest formula:
A.P/RTB.P+R+TC.P·R/TD.PRT/100✓ CorrectAnswer: D. PRT/100
Explanation: Standard SI formula.
- Q3Easy
Express 3/4 as a percentage.
A.70%B.75%✓ CorrectC.43%D.34%Answer: B. 75%
Explanation: 3 ÷ 4 = 0.75 = 75%.
- Q4Easy
Simple interest on ₹2000 at 5% p.a. for 1 year is:
A.₹50B.₹150C.₹100✓ CorrectD.₹200Answer: C. ₹100
Explanation: SI = 2000 × 5 × 1 ÷ 100 = 100.
- Q5Easy
What is 15% of ₹600?
A.₹90✓ CorrectB.₹60C.₹150D.₹45Answer: A. ₹90
Explanation: 0.15 × 600 = 90.
- Q6Easy
If principal is ₹1000 and amount after some time is ₹1200, the interest is:
A.₹100B.₹200✓ CorrectC.₹120D.₹2200Answer: B. ₹200
Explanation: Interest = Amount − Principal = 1200 − 1000 = 200.
- Q7Medium
Marked price ₹500, discount 10%. Sale price:
A.₹400B.₹450✓ CorrectC.₹490D.₹550Answer: B. ₹450
Explanation: 500 − 50 = 450.
- Q8Medium
CI on ₹1000 at 10% p.a. for 2 years compounded annually:
A.₹300B.₹200C.₹100D.₹210✓ CorrectAnswer: D. ₹210
Explanation: Amount = 1000(1.1)² = 1210; CI = 210.
- Q9Medium
An article bought for ₹250 is sold for ₹300. Find the profit percent.
A.20%✓ CorrectB.25%C.15%D.50%Answer: A. 20%
Explanation: Profit = 50; profit% = 50/250 × 100 = 20%.
- Q10Medium
Find the simple interest on ₹4000 at 8% p.a. for 2.5 years.
A.₹640B.₹900C.₹720D.₹800✓ CorrectAnswer: D. ₹800
Explanation: SI = 4000 × 8 × 2.5 ÷ 100 = 800.
- Q11Medium
A watch costing ₹800 is sold for ₹600. Find the loss percent.
A.20%B.33.3%C.25%✓ CorrectD.30%Answer: C. 25%
Explanation: Loss = 200; loss% = 200/800 × 100 = 25%.
- Q12Hard
CP ₹400, SP ₹500. Profit %:
A.25%✓ CorrectB.20%C.30%D.10%Answer: A. 25%
Explanation: Profit = 100; %=100/400×100=25.
- Q13Hard
Compound amount formula:
A.A = P/(1−R)B.A = P + R + nC.A = PRnD.A = P(1 + R/100)ⁿ✓ CorrectAnswer: D. A = P(1 + R/100)ⁿ
Explanation: Standard CI formula.
- Q14Hard
Two successive discounts of 20% and 10% are equivalent to a single discount of:
A.30%B.32%C.28%✓ CorrectD.25%Answer: C. 28%
Explanation: Net factor = 0.8 × 0.9 = 0.72, so single discount = 28%.
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This chapter has 72 questions (24 Easy · 24 Medium · 24 Hard), with timed scoring and instant feedback. The rest unlock with the ₹999/year plan.
Start this chapter free →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.
What does Class 8 Mathematics Chapter 107 (Comparing Quantities) cover on XamBaaz?+
It has 72 NCERT-based MCQs on "Comparing Quantities": 24 Easy, 24 Medium and 24 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare 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 on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Comparing Quantities" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Comparing Quantities" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Comparing Quantities" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Comparing Quantities (Class 8 Mathematics)?+
The questions that matter most test Percentage, Profit, loss & discount, Sales tax / VAT / GST, Simple interest. This page shows 14 solved important MCQs with answers and explanations; all 72 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Comparing Quantities?+
Yes — Class 8 Mathematics Comparing Quantities has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.