Keystones — Lintel
Five GCSE retrieval questions · 8 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.001
Answer: 1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 39°. Find opposite
Answer: 9.7cm -
4. Ratio Mixed ratio problems
Express the first part of 2:5 as a fraction in simplest form
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 29, 7, 18, 42, 34, 22, 34, 13
Answer: 24.9