Keystones — Lintel
Five GCSE retrieval questions · 7 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 37,000 in standard form
Answer: 3.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 12.55cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:10
Answer: 3:2:5 -
5. Statistics Mean
Calculate the mean of: 23, 23, 20, 33, 19, 29, 5. Give your answer to 2 decimal places
Answer: 21.71