Keystones — Lintel
Five GCSE retrieval questions · 23 January 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0036
Answer: 3.6 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 36°. Find opposite
Answer: 12.4cm -
4. Ratio Mixed ratio problems
£120.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £72.00 -
5. Statistics Mean
Calculate the mean of: 14, 36, 26, 32, 50, 23
Answer: 30.2