Keystones — Lintel
Five GCSE retrieval questions · 12 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00092
Answer: 9.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 49
Answer: (x - 7)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 46°. Find adjacent side
Answer: 16.7cm -
4. Ratio Mixed ratio problems
Express the first part of 4:2 as a fraction in simplest form
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 50, 44, 48, 41, 18, 37, 24, 48
Answer: 38.8