Keystones — Lintel
Five GCSE retrieval questions · 28 November 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000063 in standard form
Answer: 6.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 15x + 44
Answer: (x + 11)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.14cm -
4. Ratio Mixed ratio problems
Orange and purple sweets are in the ratio 11:5. What fraction of the sweets are purple?
Answer: 5⁄16 -
5. Statistics Mean
Calculate the mean of: 28, 32, 16, 12, 5, 50. Give your answer to 2 decimal places
Answer: 23.83