Keystones — Lintel
Five GCSE retrieval questions · 23 December 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00093
Answer: 9.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 45°. Find adjacent side
Answer: 10.6cm -
4. Ratio Mixed ratio problems
£110.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £44.00 -
5. Statistics Mean
Calculate the mean of: 40, 7, 38, 47, 5, 43, 6, 7
Answer: 24.1