Keystones — Lintel
Five GCSE retrieval questions · 18 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
910000
Answer: 9.1 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 57°. Find opposite
Answer: 20cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 42, 20, 15, 50, 15, 37
Answer: 29.8