Keystones — Lintel
Five GCSE retrieval questions · 13 May 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00026
Answer: 2.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 49°. Find opposite
Answer: 33.4cm -
4. Ratio Mixed ratio problems
Simplify: 16:16:20
Answer: 4:4:5 -
5. Statistics Mean
Calculate the mean of: 10, 20, 18, 31, 18, 9, 39, 17
Answer: 20.3