Keystones — Lintel
Five GCSE retrieval questions · 8 May 2010 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.044 in standard form
Answer: 4.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 6
Answer: (x + 2)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 16.57cm -
4. Ratio Mixed ratio problems
Simplify: 10:8:10
Answer: 5:4:5 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 35, 43, 23, 19, what is the missing number?
Answer: 60