Keystones — Lintel
Five GCSE retrieval questions · 10 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.016
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 33°. Find adjacent side
Answer: 29.4cm -
4. Ratio Mixed ratio problems
Express the first part of 4:6 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
Calculate the mean of: 48, 35, 31, 21, 29, 6, 15
Answer: 26.4