Keystones — Lintel
Five GCSE retrieval questions · 1 March 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 520,000 in standard form
Answer: 5.2 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 13.28cm -
4. Ratio Mixed ratio problems
In ratio 12:2:6, what fraction is the third part?
Answer: 3⁄10 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 48, 24, 31, 17, what is the missing number?
Answer: 60