Keystones — Lintel
Five GCSE retrieval questions · 29 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
85000
Answer: 8.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 42°. Find opposite
Answer: 10.8cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 1:2:1
Answer: 24, 48 and 24 -
5. Statistics Mean
Calculate the mean of: 47, 49, 23, 33, 33, 42, 42
Answer: 38.4