Keystones — Lintel
Five GCSE retrieval questions · 22 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 38,000 in standard form
Answer: 3.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 29.26cm -
4. Ratio Mixed ratio problems
Divide 135 in the ratio 4:1:4
Answer: 60, 15 and 60 -
5. Statistics Mean
Calculate the mean of: 45, 49, 14, 33, 7, 29, 8. Give your answer to 2 decimal places
Answer: 26.43