Keystones — Lintel
Five GCSE retrieval questions · 9 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.088 in standard form
Answer: 8.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 28.4cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 litres : 150 ml
Answer: 100:3 -
5. Statistics Mean
The mean of 6 numbers is 32. If 5 of them are 34, 29, 16, 27, 27, what is the missing number?
Answer: 59