Keystones — Lintel
Five GCSE retrieval questions · 20 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00068
Answer: 6.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 43°. Find opposite
Answer: 18.7cm -
4. Ratio Mixed ratio problems
Simplify: 8:24:12
Answer: 2:6:3 -
5. Statistics Mean
Calculate the mean of: 30, 35, 32, 31, 26, 16
Answer: 28.3