Keystones — Lintel
Five GCSE retrieval questions · 2 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0033
Answer: 3.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 51°. Find opposite
Answer: 13.6cm -
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: 25, 24, 30, 25, 34, 37, 15, 26
Answer: 27