Keystones — Lintel
Five GCSE retrieval questions · 8 March 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
56000000
Answer: 5.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 29°. Find adjacent side
Answer: 15.7cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £132.00 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 37, 24, 18, 46, 44, what is the missing number?
Answer: 47