Keystones — Lintel
Five GCSE retrieval questions · 26 October 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00004 in standard form
Answer: 4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 110
Answer: (x + 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places
Answer: 27.85cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:10
Answer: 6:4:5 -
5. Statistics Mean
Calculate the mean of: 12, 40, 5, 23, 32, 10, 32
Answer: 22