Keystones — Lintel
Five GCSE retrieval questions · 26 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0084
Answer: 8.4 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 52°. Find adjacent side
Answer: 19.7cm -
4. Ratio Mixed ratio problems
Simplify: 12:10:10
Answer: 6:5:5 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 44, 46, 20, 38, what is the missing number?
Answer: 27