Keystones — Lintel
Five GCSE retrieval questions · 11 January 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00008 in standard form
Answer: 8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 12
Answer: (x + 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.54cm -
4. Ratio Mixed ratio problems
Simplify the ratio £5 : 60p
Answer: 25:3 -
5. Statistics Mean
Calculate the mean of: 36, 36, 30, 6, 21, 47. Give your answer to 2 decimal places
Answer: 29.33