Keystones — Lintel
Five GCSE retrieval questions · 15 July 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,400,000 in standard form
Answer: 5.4 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 49
Answer: (x + 7)(x + 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 31.62cm -
4. Ratio Mixed ratio problems
Simplify: 12:8:12
Answer: 3:2:3 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 33, 32, 27, what is the missing number?
Answer: 60