Keystones — Lintel
Five GCSE retrieval questions · 4 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 28,000 in standard form
Answer: 2.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 33
Answer: (x + 11)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 41°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.11cm -
4. Ratio Mixed ratio problems
Divide 187 in the ratio 4:3:4
Answer: 68, 51 and 68 -
5. Statistics Mean
Calculate the mean of: 25, 46, 11, 43, 38, 14, 21. Give your answer to 2 decimal places
Answer: 28.29