Keystones — Lintel
Five GCSE retrieval questions · 12 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00023
Answer: 2.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 28°. Find adjacent side
Answer: 24.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics Mean
Calculate the mean of: 34, 39, 29, 22, 30, 13, 28
Answer: 27.9