Keystones — Lintel
Five GCSE retrieval questions · 27 April 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0021
Answer: 2.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 51°. Find opposite
Answer: 25.9cm -
4. Ratio Mixed ratio problems
Simplify: 24:16:20
Answer: 6:4:5 -
5. Statistics Mean
Calculate the mean of: 8, 49, 19, 8, 31, 26
Answer: 23.5