Keystones — Lintel
Five GCSE retrieval questions · 30 October 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00092
Answer: 9.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 4)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 52°. Find adjacent side
Answer: 21.5cm -
4. Ratio Mixed ratio problems
Divide 108 in the ratio 1:4:1
Answer: 18, 72 and 18 -
5. Statistics Mean
Calculate the mean of: 50, 37, 10, 7, 23, 17, 46, 32
Answer: 27.8