Keystones — Lintel
Five GCSE retrieval questions · 12 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 220,000,000 in standard form
Answer: 2.2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 5
Answer: (x + 1)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 20.65cm -
4. Ratio Mixed ratio problems
£276.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £92.00 -
5. Statistics Mean
Calculate the mean of: 46, 45, 9, 35, 18, 27, 36, 16
Answer: 29