Keystones — Lintel
Five GCSE retrieval questions · 3 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00052
Answer: 5.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 61°. Find adjacent side
Answer: 7.8cm -
4. Ratio Mixed ratio problems
Divide 92 in the ratio 2:1:1
Answer: 46, 23 and 23 -
5. Statistics Mean
Calculate the mean of: 36, 23, 39, 9, 44, 20
Answer: 28.5