Keystones — Lintel
Five GCSE retrieval questions · 25 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.031
Answer: 3.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 42°. Find opposite
Answer: 10.8cm -
4. Ratio Mixed ratio problems
Divide 240 in the ratio 1:2:2
Answer: 48, 96 and 96 -
5. Statistics Mean
Calculate the mean of: 50, 9, 31, 12, 42, 10, 10, 28
Answer: 24