Keystones — Lintel
Five GCSE retrieval questions · 19 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000098 in standard form
Answer: 9.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 33°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.03cm -
4. Ratio Mixed ratio problems
Simplify: 6:10:10
Answer: 3:5:5 -
5. Statistics Mean
Calculate the mean of: 31, 10, 41, 20, 36, 24, 35. Give your answer to 2 decimal places
Answer: 28.14