Keystones — Lintel
Five GCSE retrieval questions · 23 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00055 in standard form
Answer: 5.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x - 12
Answer: (x + 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 24.87cm -
4. Ratio Mixed ratio problems
Simplify: 6:6:8
Answer: 3:3:4 -
5. Statistics Mean
Calculate the mean of: 11, 30, 28, 44, 47, 48, 27. Give your answer to 2 decimal places
Answer: 33.57