Keystones — Lintel
Five GCSE retrieval questions · 1 October 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 560,000 in standard form
Answer: 5.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 12
Answer: (x - 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 30.03cm -
4. Ratio Mixed ratio problems
Simplify: 8:6:12
Answer: 4:3:6 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 33, 38, 43, 17, 18, what is the missing number?
Answer: 67