Keystones — Lintel
Five GCSE retrieval questions · 19 September 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
95000000
Answer: 9.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 30°. Find adjacent side
Answer: 15.6cm -
4. Ratio Mixed ratio problems
Divide 152 in the ratio 4:3:1
Answer: 76, 57 and 19 -
5. Statistics Mean
Calculate the mean of: 21, 13, 37, 25, 18, 27, 18
Answer: 22.7