Maths Quiz for Class 8
This Maths Quiz for Class 8 quiz has 10 questions picked to match the syllabus and age level, each with its answer. Play online, see your score instantly, and use the answer key for revision or the school assembly.
10 questionsMixed (easy → hard)~2 minNo timer
Updated:
If you liked this
Trending today
Bollywood QuizBollywood
India GK Question Answer Quiz (Indian GK)General Knowledge
Cricket World Cup QuizSports
सामान्य ज्ञान प्रश्न (GK in Hindi Questions)Hindi
Guess the FlagGeography
Current Affairs Quiz (October 2026)Current Affairs
Friends TV Series QuizMovies & TV
KBC क्विज़ (KBC Hindi Quiz)Hindi
F1 Quiz (Formula 1)Sports
Naruto QuizAnime & GamesAbout this Maths Quiz for Class 8 quiz
This maths quiz for Class 8 has 10 questions on topics from the Class 8 maths syllabus: squares and square roots, quadrilaterals, linear equations, rational numbers, exponents, inverse proportion, discounts, polygons, algebraic identities and compound interest. The questions start easy and finish with two that need a bit of working.
Every question is a class 8 math MCQ with four options and an explanation that shows the steps, so the quiz suits revision before a test, a homework check, or a quick round in a maths class. If you get one wrong, read the working, try it again with different numbers in your notebook, and replay the quiz. The full answer key is printed below.
Trick to keep: to multiply two numbers that sit the same distance either side of a round number, like 103 x 97, square the round number and subtract the square of the gap. 100² - 3² = 9,991, done in your head.
Maths Quiz for Class 8 questions with answers
Show answers
What is the square root of 225?
- 15
- 25
- 12.5
- 45
Answer: 15. 15 x 15 = 225, so √225 = 15. A perfect square that ends in 5 always has a square root that ends in 5.
What is the sum of the interior angles of any quadrilateral?
- 180°
- 270°
- 360°
- 540°
Answer: 360°. A diagonal splits a quadrilateral into 2 triangles, and each triangle's angles add up to 180°. 2 x 180° = 360°.
Solve: 3x - 7 = 11
- x = 4/3
- x = 6
- x = 18
- x = 3
Answer: x = 6. Add 7 to both sides: 3x = 18. Divide by 3: x = 6. Check: 3 x 6 - 7 = 11.
What is the multiplicative inverse of -3/5?
- 3/5
- 5/3
- -5/3
- -3/5
Answer: -5/3. The multiplicative inverse is the reciprocal, and the sign stays: -3/5 x -5/3 = 1. 3/5 is the additive inverse, which adds to make 0.
What is the value of 2⁻³ (2 to the power minus 3)?
- -8
- -6
- 1/6
- 1/8
Answer: 1/8. A negative power means 1 over the positive power: 2⁻³ = 1/2³ = 1/8. The minus sign in the power does not make the answer negative.
6 workers finish a job in 10 days. Working at the same rate, how many days will 12 workers take?
- 20 days
- 5 days
- 12 days
- 8 days
Answer: 5 days. More workers means fewer days, so this is inverse proportion: 6 x 10 = 12 x d, giving d = 60 ÷ 12 = 5 days.
A shirt marked ₹800 is sold at a 15% discount. What is the selling price?
- ₹680
- ₹785
- ₹120
- ₹920
Answer: ₹680. Discount = 15% of 800 = ₹120. Selling price = 800 - 120 = ₹680. ₹120 is only the discount, not the price.
Each exterior angle of a regular polygon is 45°. How many sides does it have?
- 6
- 9
- 10
- 8
Answer: 8. The exterior angles of any polygon add up to 360°. 360 ÷ 45 = 8, so it is a regular octagon.
Using an algebraic identity, what is 103 x 97?
- 10,009
- 9,991
- 9,999
- 9,901
Answer: 9,991. 103 x 97 = (100 + 3)(100 - 3) = 100² - 3² = 10,000 - 9 = 9,991. The identity (a + b)(a - b) = a² - b² turns it into mental maths.
What is the compound interest on ₹10,000 at 10% per year for 2 years, compounded yearly?
- ₹2,000
- ₹12,100
- ₹2,100
- ₹1,100
Answer: ₹2,100. Amount = 10,000 x 1.1 x 1.1 = ₹12,100, so CI = ₹2,100. Simple interest would be only ₹2,000; the extra ₹100 is interest on the first year's interest.
Frequently asked questions
Where can I find Maths for Class 8 questions with answers?
Right here. Play the quiz for an instant score, then open the answer key further down the page to see all 10 Class 8 maths questions with answers and the working for each.
How many questions are in this Maths for Class 8 quiz?
There are 10 multiple-choice questions, each with four options. They move from easy (the square root of 225) to harder ones on identities and compound interest, and most students finish in about ten minutes.
Can I play the Maths for Class 8 quiz online for free without signing up?
Yes. The quiz is completely free and needs no login or sign-up. It works on phones, tablets and computers, and you can replay it as often as you like.