Keystones — Lintel
Five GCSE retrieval questions · 19 December 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 87,000 in standard form
Answer: 8.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 49
Answer: (x + 7)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 57°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.71cm -
4. Ratio Mixed ratio problems
Simplify: 8:4:12
Answer: 2:1:3 -
5. Statistics Mean
Calculate the mean of: 30, 28, 44, 5, 38, 42, 8. Give your answer to 2 decimal places
Answer: 27.86