Keystones — Lintel
Five GCSE retrieval questions · 25 August 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 97,000,000 in standard form
Answer: 9.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x + 3
Answer: (x + 3)(x + 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 24.28cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m : 15cm
Answer: 160:3 -
5. Statistics Mean
Calculate the mean of: 16, 24, 6, 32, 40, 35, 31, 38
Answer: 27.75