Keystones — Lintel
Five GCSE retrieval questions · 1 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0079
Answer: 7.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 65°. Find adjacent side
Answer: 8cm -
4. Ratio Mixed ratio problems
Divide 147 in the ratio 2:3:2
Answer: 42, 63 and 42 -
5. Statistics Mean
Calculate the mean of: 16, 22, 5, 18, 6, 5
Answer: 12