Keystones — Lintel
Five GCSE retrieval questions · 23 December 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
630000
Answer: 6.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x + 9
Answer: (x - 3)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 35°. Find opposite
Answer: 21cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:9
Answer: 4:2:3 -
5. Statistics Mean
Calculate the mean of: 7, 25, 46, 10, 6, 35, 28, 42
Answer: 24.9