Keystones — Lintel
Five GCSE retrieval questions · 2 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00028
Answer: 2.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 47°. Find adjacent side
Answer: 16.4cm -
4. Ratio Mixed ratio problems
£308.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £220.00 -
5. Statistics Mean
Calculate the mean of: 44, 24, 14, 19, 31, 21, 42
Answer: 27.9