Keystones — Lintel
Five GCSE retrieval questions · 19 July 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0006
Answer: 6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 51°. Find opposite
Answer: 30.9cm -
4. Ratio Mixed ratio problems
Express the first part of 2:6 as a fraction in simplest form
Answer: 1⁄4 -
5. Statistics Mean
Calculate the mean of: 35, 47, 29, 16, 25, 19, 18
Answer: 27