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Mathematics
Numbers, Shapes & Proofs
The constants, shapes and terms worth actually knowing.
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What is the value of pi to two decimal places?
Measures and Everyday Maths
The maths people genuinely use — in shops, kitchens, spreadsheets and news reports.
About this topic
Most adults use a narrow slice of mathematics constantly and the rest of it almost never. That slice is percentages, averages, ratios and unit conversion — the arithmetic behind a discount, a recipe scaled for six, a mortgage rate or a statistic quoted on the news. This quiz stays inside that slice. There is nothing here requiring algebra or a calculator, but several questions cover the places where everyday reasoning reliably goes wrong, such as what an average does and does not tell you.
Questions & answers
Measures and Everyday Maths: all 10 questions and answers
Every question in this quiz is listed below with its correct answer and the reasoning behind it. Play first if you would rather not see the answers — or read through as a study sheet.
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1What is 25% of 200?
- A 25
- B 50 Correct
- C 40
- D 75
Answer: B. 50
Why: A quarter of 200. Percentages are just hundredths, so 25% means 25 parts in every 100.
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2If a £80 coat is reduced by 10%, what does it cost?
- A £72 Correct
- B £70
- C £78
- D £75
Answer: A. £72
Why: Ten per cent of 80 is 8. Successive discounts do not simply add, which is why "20% off, then 10% off" is not 30% off.
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3The median of a set of numbers is what?
- A The most common value
- B The total divided by the count
- C The difference between highest and lowest
- D The middle value when they are put in order Correct
Answer: D. The middle value when they are put in order
Why: The mean is the total divided by the count and the mode is the most common. Median resists distortion by extreme values.
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4How many centimetres are in a metre?
- A 1,000
- B 12
- C 100 Correct
- D 10
Answer: C. 100
Why: The prefix "centi" means one hundredth. A kilometre is a thousand metres.
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5How many millilitres are in a litre?
- A 500
- B 1,000 Correct
- C 100
- D 10
Answer: B. 1,000
Why: One millilitre occupies exactly one cubic centimetre, which is why recipes and syringes use both units interchangeably.
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6A right angle measures how many degrees?
- A 90 Correct
- B 45
- C 180
- D 60
Answer: A. 90
Why: Four right angles make a full turn of 360 degrees. Two make a straight line.
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7If three items cost £7.50 in total, what is the price of one?
- A £2.25
- B £3.00
- C £2.75
- D £2.50 Correct
Answer: D. £2.50
Why: Dividing by the count gives the unit price, which is the only reliable way to compare differently sized packs.
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8What is the perimeter of a rectangle measuring 5m by 3m?
- A 8 metres
- B 30 metres
- C 16 metres Correct
- D 15 metres
Answer: C. 16 metres
Why: Perimeter adds all four sides. Its area, by contrast, would be 15 square metres.
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9A ratio of 2:3 means the two quantities relate how?
- A The second is 23% larger
- B For every 2 of the first there are 3 of the second Correct
- C The first is twice the second
- D They differ by three
Answer: B. For every 2 of the first there are 3 of the second
Why: Ratios describe proportion, not absolute size, so 2:3 and 20:30 are identical.
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10Which of these is equal to one half?
- A 0.5 Correct
- B 0.05
- C 1.5
- D 5.0
Answer: A. 0.5
Why: One half is also 50%. Fractions, decimals and percentages are three notations for the same thing.
Frequently asked questions about Measures and Everyday Maths
How many questions are in Measures and Everyday Maths?
Measures and Everyday Maths has 10 questions and takes about 6 minutes to finish. It is rated Easy and sits in our Mathematics category.
How is Measures and Everyday Maths scored?
Each of the 10 correct answers adds 10 XP, up to 100 XP for a clean run. Wrong answers cost you nothing, and your full question-by-question review is shown at the end.
Are the answers to Measures and Everyday Maths explained?
Yes. All 10 questions carry a written explanation of why the correct answer is right, so the quiz works as a study sheet as well as a test.
Can I replay Measures and Everyday Maths?
Yes, as often as you like. The questions and the answer options are reshuffled on each run, and you can use Practice Mistakes afterwards to retry only the ones you missed. No account is needed to play.
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