Keystones — Lintel
Five GCSE retrieval questions · 2 June 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 95,000,000 in standard form
Answer: 9.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 39°. Find opposite. Give your answer to 2 decimal places
Answer: 14.58cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 350g
Answer: 60:7 -
5. Statistics Mean
Calculate the mean of: 13, 48, 32, 32, 42, 19
Answer: 31