Keystones — Lintel
Five GCSE retrieval questions · 8 February 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 75,000 in standard form
Answer: 7.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 18x + 77
Answer: (x + 11)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 21.07cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 4:2:3
Answer: 96, 48 and 72 -
5. Statistics Mean
Calculate the mean of: 28, 27, 19, 12, 30, 23, 5, 25. Give your answer to 2 decimal places
Answer: 21.13