AQA · Mathematics · 8300
GCSE Maths: Number: best buys
Ratio & Proportion · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths textbook exercise and practice questions for Number: best buys (Corbettmaths Video 210), and every card links back to the exact page it came from. Practice tests generate fresh variations of these questions, so the numbers change every attempt. Source material © Corbettmaths — used with attribution.
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What is the method to compare which of two products is better value for money?
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Calculate the unit price (cost per item, per gram, per litre, etc.) for each option and compare. The option with the lower unit price is better value.
Why might a customer choose to buy a pack that is NOT the best value for money?
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Reasons include: cannot afford the larger upfront cost, don't need the larger quantity, limited storage space, or the product may expire before use.
When comparing best buys for items sold in different units (e.g., grams vs. kilograms), what must you do first?
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Convert both quantities to the same unit before calculating and comparing the unit prices.
If a 4-pack costs £1.80 (least value), an 8-pack costs £3.52 (best value), what can you determine about the 6-pack's price range?
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The 6-pack's unit price must be between the 8-pack's unit price (lowest, £0.44 each) and the 4-pack's unit price (highest, £0.45 each), so it costs between £2.64 and £2.70.
When calculating the cheapest way to buy 24 glue sticks (75p each or £3.50 for 5), what strategy should you use?
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Calculate the cost of buying the required quantity using different combinations of the available options, then compare to find the minimum total cost.
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