Keystones — Lintel
Five GCSE retrieval questions · 4 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.065 in standard form
Answer: 6.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 26.11cm -
4. Ratio Mixed ratio problems
Simplify the ratio kg : 500g
Answer: 2:1 -
5. Statistics Mean
Calculate the mean of: 40, 25, 46, 10, 25, 36, 18, 25. Give your answer to 2 decimal places
Answer: 28.13