Keystones — Lintel
Five GCSE retrieval questions · 25 September 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 98,000 in standard form
Answer: 9.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 108
Answer: (x + 12)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 31°. Find opposite. Give your answer to 2 decimal places
Answer: 13.22cm -
4. Ratio Mixed ratio problems
Divide 44 in the ratio 2:1:1
Answer: 22, 11 and 11 -
5. Statistics Mean
Calculate the mean of: 33, 28, 44, 45, 47, 9, 19, 12. Give your answer to 2 decimal places
Answer: 29.63