Keystones — Lintel
Five GCSE retrieval questions · 8 February 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00031
Answer: 3.1 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 3)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 46°. Find opposite
Answer: 31.cm -
4. Ratio Mixed ratio problems
£217.00 is shared between A and B in the ratio 4:3. How much does A receive?
Answer: £124.00 -
5. Statistics Mean
Calculate the mean of: 46, 28, 12, 44, 34, 41, 37, 47
Answer: 36.1