Class 8 Maths and Science Quiz
Practise Class 8 maths and science with a free quiz of 5, 10, 15 or 20 questions. Half maths, half science, matched to Class 8 (Grade 8, UK Year 9, ages 13 to 14), with the right answer and a short explanation after every question.
Choose your quiz length
How many questions would you like? 10 questions means 5 math + 5 science.
What the Class 8 quiz covers
Maths
- Equations and simultaneous equations
- Percentage change and LCM
- Pythagoras' theorem
- Squares and roots
Science
- Atomic structure and the periodic table
- Chemical reactions and conservation of mass
- Heat transfer, pressure and power
- Photosynthesis and the nervous system
Class 8 sample questions with answers
Class 8 is Grade 8 in the US and Year 9 in England (ages 13 to 14). These sample questions show the level; the quiz gives new maths numbers every round and mixes in science from a bank written for this class.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | What is 20% of 140? | 28 | 20% of 140 = 20 ÷ 100 × 140 = 28. |
| Maths | Solve for x: 5x + 7 = 57 | 10 | Subtract 7: 5x = 50. Divide by 5: x = 10. |
| Maths | A rectangle is 7 m long and 7 m wide. What is its perimeter (m)? | 28 | Perimeter = 2 × (7 + 7) = 28 m. |
| Maths | What is the mean of 32, 29, 35, 40, 29? | 33 | The numbers add up to 165. 165 ÷ 5 = 33. |
| Science | What does the atomic number of an element tell you? | The number of protons | The atomic number is the number of protons. |
| Science | Which group of the periodic table contains the alkali metals? | Group 1 | Group 1 are the alkali metals. |
| Science | What is the chemical formula of carbon dioxide? | CO₂ | One carbon atom and two oxygen atoms. |
| Science | What is conserved in a chemical reaction? | Mass | Mass is conserved: atoms are only rearranged. |
Frequently Asked Questions (FAQs)
Maths covers equations and simultaneous equations, percentage change and lcm, pythagoras' theorem, squares and roots. Science covers atomic structure and the periodic table, chemical reactions and conservation of mass, heat transfer, pressure and power, photosynthesis and the nervous system.
Class 8 matches Grade 8 in the US and Year 9 in England, for children aged about 13 to 14.
Yes. After every question the right answer is highlighted with a short explanation, and the results page lets you review every question.
You choose 5, 10, 15 or 20 questions. Even lengths are exactly half maths and half science, and the maths numbers change every round.
Yes. There is no sign-up, and it works on phones, tablets and computers.
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