Keystones — Lintel
Five GCSE retrieval questions · 14 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0091
Answer: 9.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 31°. Find adjacent side
Answer: 22.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 32, 38, 35, 30, 46, what is the missing number?
Answer: -7