Keystones — Lintel
Five GCSE retrieval questions · 9 April 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 27,000 in standard form
Answer: 2.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 21
Answer: (x + 7)(x + 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.38cm -
4. Ratio Mixed ratio problems
£312.00 is shared between A and B in the ratio 3:5. How much does A receive?
Answer: £117.00 -
5. Statistics Mean
Calculate the mean of: 12, 42, 12, 24, 33, 49, 35. Give your answer to 2 decimal places
Answer: 29.57