Keystones — Lintel
Five GCSE retrieval questions · 12 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.055 in standard form
Answer: 5.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 80
Answer: (x - 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 11.9cm -
4. Ratio Mixed ratio problems
£150.00 is shared between A and B in the ratio 2:3. How much does A receive?
Answer: £60.00 -
5. Statistics Mean
Calculate the mean of: 11, 31, 33, 49, 19, 13, 43. Give your answer to 2 decimal places
Answer: 28.43