Keystones — Lintel
Five GCSE retrieval questions · 14 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 150,000,000 in standard form
Answer: 1.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 60
Answer: (x + 10)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.75cm -
4. Ratio Mixed ratio problems
Divide 133 in the ratio 1:3:3
Answer: 19, 57 and 57 -
5. Statistics Mean
Calculate the mean of: 30, 45, 45, 36, 28, 13. Give your answer to 2 decimal places
Answer: 32.83