Keystones — Lintel
Five GCSE retrieval questions · 19 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00029
Answer: 2.9 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 37°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
Divide 138 in the ratio 4:1:1
Answer: 92, 23 and 23 -
5. Statistics Mean
Calculate the mean of: 16, 41, 34, 16, 42, 27
Answer: 29.3