Math & Science Quiz
Play this free math and science quiz: choose Easy, Medium, Hard, Expert or Mixed, pick 5, 10, 15 or 20 questions, and get instant explanations and a score at the end.
Quick answer: The Math and Science Quiz lets you choose a level (Easy, Medium, Hard, Expert or Mixed) and a length of 5, 10, 15 or 20 questions. Each answer comes with an instant explanation, and you get a score at the end. There are also separate quizzes for each class from Class 3 to Class 10.
Choose your class or level
Pick your class or a difficulty, then choose 5, 10, 15 or 20 questions. Every quiz is half maths and half science, shown one at a time. Maths numbers change every round, and science questions don’t repeat until you’ve seen them all.
Pick your class
Or choose a difficulty
How do you use the Math & Science Quiz?
- Choose a level. Pick Easy, Medium, Hard, Expert or Mixed.
- Choose how many questions. Select 5, 10, 15 or 20 questions.
- Answer and read the explanations. Each answer shows an explanation, and the final score appears at the end of the round.
What is the formula, and what does a worked example look like?
Formula: Score = number of correct answers. Percentage = correct ÷ total questions × 100. A quiz has 5, 10, 15 or 20 questions, split as evenly as possible between math and science.
Example: 17 correct out of 20 = 85%. 8 of 10, 12 of 15 and 4 of 5 are each 80%. Playing again gives new questions.
Method & source: Math questions are generated with random numbers and checked by tests; science questions are drawn from a fixed, reviewed bank. See how we test our calculators.
Next step: try percentage change or weighted grades.
What is the Math and Science Quiz?
The Math and Science Quiz is a free, self-paced quiz that mixes arithmetic and algebra with general science. You answer one multiple-choice question at a time, see straight away whether you were right, read a short explanation and move on. At the end you get a score, a percentage, a breakdown by subject and a review of every question.
This maths and science quiz has four difficulty levels – Easy, Medium, Hard and Expert – plus a Mixed challenge that blends all four. You also choose the length: 5, 10, 15 or 20 questions, always split as evenly as possible between maths and science, so you practise both without needing two separate tools.
How do you start a round?
Choose a level, then choose how many questions you want and press Start Quiz. There is no timer and no sign-up.
- Your choice of length: 5, 10, 15 or 20 questions, shown one at a time in a random order with a progress bar.
- Half maths, half science: even lengths split exactly in half, and with 5 or 15 questions one subject gets the extra question.
- Fresh maths every time: the numbers are generated for each round, so replaying never gives the same sums.
- Science that does not repeat: questions come from a bank at each level and are not repeated until you have seen them all.
- Instant feedback: the right answer is highlighted with a short explanation after every question.
- Retry and level up: play again with new questions, change the difficulty or try the next level up.
Your best result for each level is remembered in your own browser only, as a percentage so quizzes of different lengths can be compared. Nothing you answer is sent to a server.
What is this quiz format good for?
Testing yourself is one of the most effective ways to remember what you know and to find what you do not.
- Retrieval practice: answering questions strengthens memory more than re-reading notes.
- Immediate explanations turn a wrong answer into a learning moment.
- Short rounds fit into a break, a commute or a study session.
- Levels let beginners build confidence and stronger learners stay challenged.
- Mixing maths and science keeps every round varied and interesting.
Use the quiz as a warm-up, a friendly challenge with family or friends, or a quick check of what you remember from school.
Worked walkthrough: a 15-question medium quiz
You choose Medium and then 15 questions. The quiz builds 15 questions, either 7 math and 8 science or 8 math and 7 science because one subject gets the extra question. Math questions might be “Solve for x: 4x + 7 = 39” (answer 8) or “What is 35% of 240?” (answer 84), and a science question might be “Which part of the cell is called its powerhouse?” (mitochondria). You answer each one, watch the progress bar fill, see whether you were right and read the explanation. Suppose you finish with 12 correct: the result screen shows 12 / 15, which is 80%, a breakdown such as 6 of 7 math and 6 of 8 science, and your best Medium result as 80% (12/15). Choosing Play Again gives new numbers and science questions you have not seen yet.
Getting more out of each round
- Start on Easy to warm up, then move to Medium and Hard once you regularly score around 80%, and try Expert when Hard feels comfortable.
- For percentage questions, break the number down: 10% is one tenth, so 35% is 10% × 3 plus 5%.
- In algebra questions, do the same thing to both sides of the equation – subtract first, then divide.
- For science questions, eliminate options you know are wrong before choosing between the last two.
- Read the explanation even when you are right – it often includes a fact or shortcut that helps with the next round.
How a round is built
Each quiz has the number of questions you choose, 5, 10, 15 or 20, split as evenly as possible between math and science and shown one at a time in a random order. Even lengths are exactly half and half (10 is 5 and 5, 20 is 10 and 10); with 5 or 15 questions one subject, picked at random, gets the extra question. Math questions are generated with fresh numbers every round, so the sum 35% of 240 today may be 45% of 180 next time. Science questions come from a bank and are not repeated until you have seen them all at that level.
What each level covers
| Level | Math and science topics |
|---|---|
| Easy | Times tables, basic arithmetic, simple percentages and everyday science |
| Medium | Fractions, equations, geometry and core science facts |
| Hard | Algebra, probability, compound interest and tougher science |
| Expert | Multi-step math, ratios and probability, and advanced physics, chemistry, biology and earth science |
| Mixed | A random blend of Easy, Medium, Hard and Expert questions |
A good route is to start on Easy to warm up and move up once you are regularly scoring around 80%. The result screen offers the next level up after Easy, Medium and Hard.
Math and science quiz questions by class and year
These sample questions show what each stage looks like, with the answer and the working. Classes are shown with the nearest UK year group (England) and US grade, so the questions suit Pakistan, India, the UK and the US. The quiz level in brackets is the one to start on; the quiz itself serves new questions each round.
Class 3 and 4 (Grade 3 and 4 / UK Year 4 and 5, ages 8 to 10) – start on Easy.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | What is 7 × 8? | 56 | 7 × 8 = 56, a times-table fact worth knowing by heart. |
| Maths | What is 3/4 of 20? | 15 | 20 ÷ 4 = 5, then 5 × 3 = 15. |
| Maths | What is 245 + 178? | 423 | 245 + 178 = 423: add the hundreds, tens and ones. |
| Maths | What is 100 − 37? | 63 | 100 − 37 = 63: take 40 off to get 60, then add 3 back. |
| Maths | How many minutes are in 2 hours? | 120 | There are 60 minutes in an hour, so 2 × 60 = 120. |
| Science | Which organ pumps blood around the body? | The heart | The heart is a muscle that pumps blood through the blood vessels. |
| Science | At what temperature does water boil at sea level, in °C? | 100 °C | Pure water boils at 100 °C at normal sea-level air pressure. |
| Science | Which gas do plants take in from the air to make food? | Carbon dioxide | Plants use carbon dioxide, water and light in photosynthesis. |
| Science | What do we call animals that eat only plants? | Herbivores | Herbivores such as cows and rabbits eat only plants; carnivores eat meat. |
| Science | Which part of the body do we use to see? | The eyes | Light enters the eye and the brain turns the signals into what we see. |
Class 5 and 6 (Grade 5 and 6 / UK Year 6 and 7, ages 10 to 12) – start on Easy.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | What is 35% of 240? | 84 | 10% of 240 is 24, so 30% is 72 and 5% is 12; 72 + 12 = 84. |
| Maths | A rectangle is 14 m long and 9 m wide. What is its area in m²? | 126 | Area = length × width = 14 × 9 = 126 m². |
| Maths | What is the mean of 4, 8, 9, 11 and 13? | 9 | The numbers add up to 45, and 45 ÷ 5 = 9. |
| Maths | Write 3/5 as a percentage. | 60% | 3 ÷ 5 = 0.6, and 0.6 × 100 = 60%. |
| Maths | Round 4,672 to the nearest hundred. | 4,700 | The tens digit is 7, which is 5 or more, so round up to 4,700. |
| Science | Which planet is closest to the Sun? | Mercury | Mercury orbits closest to the Sun; Venus is second. |
| Science | Which force pulls objects towards the Earth? | Gravity | Gravity is the force that pulls objects towards the centre of the Earth. |
| Science | What is it called when a liquid turns into a gas? | Evaporation | Evaporation happens when liquid particles gain enough energy to escape as gas. |
| Science | Which force slows down a book sliding across a table? | Friction | Friction acts between two surfaces in contact and opposes motion. |
| Science | Which gas makes up most of the air we breathe? | Nitrogen | Air is about 78% nitrogen and about 21% oxygen. |
Class 7 and 8 (Grade 7 and 8 / UK Year 8 and 9, ages 12 to 14) – start on Medium.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | Solve for x: 3x + 7 = 34 | 9 | Subtract 7 to get 3x = 27, then divide by 3: x = 9. |
| Maths | What is 15% of £80? | £12 | 10% of £80 is £8 and 5% is £4, so 15% is £12. |
| Maths | Simplify the ratio 24 : 36 to its simplest form. | 2 : 3 | Divide both numbers by 12, their highest common factor, to get 2 : 3. |
| Maths | What is the area of a triangle with base 10 cm and height 6 cm? | 30 cm² | Area = ½ × base × height = ½ × 10 × 6 = 30 cm². |
| Maths | What is −8 + 15? | 7 | Start at −8 and move 15 up the number line to reach 7. |
| Science | What is the chemical symbol for sodium? | Na | Na comes from the Latin name natrium. |
| Science | Which part of the cell releases energy from food? | The mitochondria | Mitochondria are where aerobic respiration releases energy. |
| Science | What is the unit of force? | The newton (N) | Force is measured in newtons, named after Isaac Newton. |
| Science | What is the chemical formula of water? | H₂O | Each water molecule has two hydrogen atoms and one oxygen atom. |
| Science | What do we call a substance that speeds up a reaction without being used up? | A catalyst | A catalyst lowers the energy needed for a reaction and is not used up. |
Class 9 (Grade 9 / UK Year 10, ages 14 to 15) – start on Hard.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | Solve for x: 2x − 5 = 17 | 11 | Add 5 to get 2x = 22, then divide by 2: x = 11. |
| Maths | A right-angled triangle has shorter sides of 6 cm and 8 cm. How long is the hypotenuse? | 10 cm | √(6² + 8²) = √100 = 10 cm. |
| Maths | A price of £150 rises by 20%. What is the new price? | £180 | £150 × 1.20 = £180. |
| Maths | Expand 3(x + 4). | 3x + 12 | Multiply each term inside the bracket by 3: 3 × x = 3x and 3 × 4 = 12. |
| Maths | What is the gradient of the line y = 4x − 3? | 4 | In y = mx + c the gradient is m, the number multiplying x. |
| Science | What is the pH of a neutral solution such as pure water? | 7 | Below 7 is acidic and above 7 is alkaline. |
| Science | How many chromosomes are in a normal human body cell? | 46 | Humans have 23 pairs of chromosomes, so 46 in total. |
| Science | A car travels 150 km in 2.5 hours. What is its average speed? | 60 km/h | Speed = distance ÷ time = 150 ÷ 2.5 = 60 km/h. |
| Science | Which gas is released when an acid reacts with a metal such as magnesium? | Hydrogen | Acid + metal gives a salt and hydrogen gas. |
| Science | A 2 kg ball moves at 3 m/s. What is its kinetic energy? | 9 J | Kinetic energy = ½ × mass × speed² = ½ × 2 × 9 = 9 J. |
Class 10 (GCSE) (Grade 10 / UK Year 11, ages 15 to 16) – start on Expert.
| Subject | Question | Answer | Why |
|---|---|---|---|
| Maths | Solve x² − 7x + 12 = 0. What is the larger root? | 4 | Factorise: (x − 3)(x − 4) = 0, so the roots are 3 and 4. |
| Maths | £2,000 is invested for 2 years at 5% compound interest a year. What is it worth? | £2,205 | £2,000 × 1.05² = £2,205. |
| Maths | A bag holds 3 red and 5 blue marbles. What is the probability of picking a red one? | 3/8 | 3 red out of 8 marbles in total gives 3/8. |
| Maths | Find the nth term of the sequence 5, 8, 11, 14. | 3n + 2 | The sequence goes up by 3 each time and 3 × 1 + 2 = 5, so the nth term is 3n + 2. |
| Maths | What is sin 30°? | 0.5 | sin 30° = 0.5, one of the exact values to remember. |
| Science | Which particle in an atom has a negative charge? | The electron | Protons are positive, neutrons are neutral and electrons are negative. |
| Science | What is the chemical formula of carbon dioxide? | CO₂ | One carbon atom bonded to two oxygen atoms. |
| Science | A 12 V supply drives a current through a 4 Ω resistor. What is the current? | 3 A | Current = voltage ÷ resistance = 12 ÷ 4 = 3 A. |
| Science | What is the unit of electrical resistance? | The ohm (Ω) | Resistance is measured in ohms; 1 Ω lets 1 A flow per volt. |
| Science | Which type of bond forms when atoms share electrons? | Covalent | In a covalent bond two non-metal atoms share a pair of electrons. |
Pick the level that matches the year, play a round, and move up once you regularly score about 80%. A younger child can start one level lower and read each explanation together.
Why short practice rounds work
Trying to recall an answer strengthens memory more than rereading the same material, an effect researchers call retrieval practice. Getting feedback straight away helps too: the correct answer is highlighted with a short explanation after every question, so a wrong guess becomes a small lesson rather than a lost point. A 5-question quiz suits a short break or a commute, and a 15 or 20-question quiz works as a proper revision session.
Turning wrong answers into progress
When a question catches you out, work the same idea through slowly with a tool. Percentage questions can be checked with the percentage change calculator and its step-by-step working. The Hard level includes compound interest questions, and the compound interest calculator pairs well with them because you can watch a balance grow year by year.
Reading your score
Your score is the number of correct answers out of the quiz length, shown with a percentage so different lengths compare fairly: 4 of 5, 8 of 10, 12 of 15 and 16 of 20 are all 80%. The result screen also splits the score into math and science so you can see which side needs attention. Your best result for each level is remembered in your own browser as a percentage with the score, for example 90% (18/20), so clearing browser data removes it and nothing you answer is sent to a server.
Frequently Asked Questions (FAQs)
You choose: 5, 10, 15 or 20. Each quiz is split as evenly as possible between maths and science – 10 questions is 5 and 5, 20 is 10 and 10, and with 5 or 15 questions one subject gets the extra question. When you finish you can play again with new questions.
Easy covers times tables, basic arithmetic, simple percentages and everyday science. Medium adds fractions, equations, geometry and core science facts. Hard includes algebra, probability, compound interest and tougher science. Expert has multi-step maths and more advanced physics, chemistry, biology and earth science. Mixed challenge blends Easy, Medium, Hard and Expert questions.
Yes. The numbers in maths questions are generated fresh every round, and science questions are drawn from a bank without repeating until you have seen them all at that level.
Your best result for each level is saved in your own browser as a percentage with the score, for example 90% (18/20), so quizzes of different lengths can be compared fairly. It is not sent anywhere, and clearing your browser data removes it.
It is completely free and needs no account or sign-up. Just pick a level and a quiz length, then start.
Maths ranges from times tables and fractions to algebra and compound interest depending on the level, and science spans physics, chemistry, biology and earth science questions at each level.
Yes. After each question you see whether you were right and a short explanation, and you get a score at the end.
Expert and Hard are the most demanding levels, and Easy is a gentler start for children and beginners. Pick the level that fits you.
Easy. Class 5 is Grade 5 and UK Year 6, and Easy covers times tables, simple percentages, area and everyday science. Pick the Class 5 quiz for questions written for that class, and move up once you regularly score about 80%.
Yes. Class 9 (UK Year 10) and Class 10 (UK Year 11, GCSE) have their own quizzes with algebra, quadratics, compound interest, probability and GCSE-level science.
Yes. After every question the right answer is highlighted with a short explanation, and the page lists sample questions with worked answers for each class from Class 3 to Class 10.
Yes. The quiz is designed for phones with large buttons and works in any modern browser.