Keystones — Lintel
Five GCSE retrieval questions · 18 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
3800000
Answer: 3.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 39°. Find opposite
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:16
Answer: 4:3:4 -
5. Statistics Mean
Calculate the mean of: 16, 28, 46, 19, 13, 42, 32
Answer: 28