Keystones — Lintel
Five GCSE retrieval questions · 7 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.088
Answer: 8.8 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 36°. Find opposite
Answer: 8cm -
4. Ratio Mixed ratio problems
Divide 77 in the ratio 3:1:3
Answer: 33, 11 and 33 -
5. Statistics Mean
Calculate the mean of: 30, 38, 19, 26, 21, 47, 39
Answer: 31.4