Keystones — Lintel
Five GCSE retrieval questions · 11 March 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 56,000 in standard form
Answer: 5.6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 6)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 43°. Find opposite. Give your answer to 2 decimal places
Answer: 20.52cm -
4. Ratio Mixed ratio problems
Express the second part of 6:5 as a fraction in simplest form
Answer: 5⁄11 -
5. Statistics Mean
The mean of 6 numbers is 26. If 5 of them are 34, 24, 21, 35, 18, what is the missing number?
Answer: 24