Keystones — Lintel
Five GCSE retrieval questions · 19 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00044
Answer: 4.4 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 34°. Find opposite
Answer: 9.4cm -
4. Ratio Mixed ratio problems
Divide 117 in the ratio 3:4:2
Answer: 39, 52 and 26 -
5. Statistics Mean
Calculate the mean of: 34, 29, 7, 48, 20, 20, 25, 45
Answer: 28.5