Keystones — Lintel
Five GCSE retrieval questions · 11 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
85000000
Answer: 8.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 50°. Find opposite
Answer: 14.3cm -
4. Ratio Mixed ratio problems
Divide 100 in the ratio 2:2:1
Answer: 40, 40 and 20 -
5. Statistics Mean
Calculate the mean of: 42, 32, 49, 40, 17, 8, 34
Answer: 31.7