Keystones — Lintel
Five GCSE retrieval questions · 13 August 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
900000
Answer: 9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 51°. Find adjacent side
Answer: 10.7cm -
4. Ratio Mixed ratio problems
Simplify: 10:6:4
Answer: 5:3:2 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 31, 22, 30, what is the missing number?
Answer: 37