Class 9 Maths and Science Quiz
Practise Class 9 maths and science with a free quiz of 5, 10, 15 or 20 questions. Half maths, half science, matched to Class 9 (Grade 9, UK Year 10, ages 14 to 15), 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 9 quiz covers
Maths
- Quadratic equations and simultaneous equations
- Compound interest and sequences
- Probability and percentage change
- Pythagoras' theorem
Science
- Ohm's law and Newton's laws
- Mitosis, enzymes and natural selection
- Radioactivity and half-life
- Waves and the electromagnetic spectrum
Class 9 sample questions with answers
Class 9 is Grade 9 in the US and Year 10 in England (ages 14 to 15). 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 | Solve x² − 19x + 88 = 0. What is the larger root? | 11 | Factorise: (x − 8)(x − 11) = 0, so the roots are 8 and 11. The larger is 11. |
| Maths | x + y = 12 and x − y = 2. What is x? | 7 | Add the equations: 2x = 14, so x = 7. |
| Maths | £2,500.00 is invested for 2 years at 5% compound interest a year. What is it worth at the end? | £2,756.25 | £2,500.00 × 1.05² = £2,756.25. |
| Maths | What is 2^9? | 512 | Doubling 9 times from 1 gives 2^9 = 512. |
| Science | Which equation is Ohm's law? | V = IR | Voltage = current × resistance. |
| Science | What do we call the noble gases in Group 0? | Unreactive gases | Noble gases rarely react. |
| Science | What does mitosis produce? | Two identical cells | Mitosis makes two genetically identical cells. |
| Science | What is the half-life of a radioactive isotope? | The time for half the nuclei to decay | It is the time for half the nuclei to decay. |
Frequently Asked Questions (FAQs)
Maths covers quadratic equations and simultaneous equations, compound interest and sequences, probability and percentage change, pythagoras' theorem. Science covers ohm's law and newton's laws, mitosis, enzymes and natural selection, radioactivity and half-life, waves and the electromagnetic spectrum.
Class 9 matches Grade 9 in the US and Year 10 in England, for children aged about 14 to 15.
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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