Keystones — Lintel
Five GCSE retrieval questions · 19 July 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.0023 in standard form
Answer: 2.3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 108
Answer: (x + 12)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 26.18cm -
4. Ratio Mixed ratio problems
£208.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £130.00 -
5. Statistics Mean
Calculate the mean of: 50, 35, 29, 50, 38, 40. Give your answer to 2 decimal places
Answer: 40.33