Keystones — Lintel
Five GCSE retrieval questions · 26 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00018
Answer: 1.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 8
Answer: (x - 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 63°. Find adjacent side
Answer: 13.2cm -
4. Ratio Mixed ratio problems
Divide 112 in the ratio 1:2:1
Answer: 28, 56 and 28 -
5. Statistics Mean
Calculate the mean of: 9, 35, 18, 19, 21, 20
Answer: 20.3