Keystones — Lintel
Five GCSE retrieval questions · 3 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0033
Answer: 3.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 29°. Find adjacent side
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 3:2:3
Answer: 36, 24 and 36 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 19, 23, 35, what is the missing number?
Answer: 83