Keystones — Lintel
Five GCSE retrieval questions · 10 July 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0062
Answer: 6.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 33°. Find opposite
Answer: 14.3cm -
4. Ratio Mixed ratio problems
Divide 208 in the ratio 4:3:1
Answer: 104, 78 and 26 -
5. Statistics Mean
Calculate the mean of: 32, 30, 26, 45, 15, 18, 34
Answer: 28.6