Keystones — Lintel
Five GCSE retrieval questions · 11 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00099
Answer: 9.9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 36°. Find opposite
Answer: 11.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 30, 10, 33, 46, 6, 27, 31, 8
Answer: 23.9