Keystones — Lintel
Five GCSE retrieval questions · 26 January 2025 · mathsvault.uk/keystones
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1. Number Converting to standard form
99000
Answer: 9.9 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 37°. Find adjacent side
Answer: 29.5cm -
4. Ratio Mixed ratio problems
£250.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £150.00 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 15, 16, 25, what is the missing number?
Answer: 36