Keystones — Lintel
Five GCSE retrieval questions · 18 February 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 180,000 in standard form
Answer: 1.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 3
Answer: (x + 3)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 25.98cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m : 50cm
Answer: 4:1 -
5. Statistics Mean
Calculate the mean of: 40, 13, 8, 31, 8, 27, 33, 11. Give your answer to 2 decimal places
Answer: 21.38