Keystones — Lintel
Five GCSE retrieval questions · 19 January 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 5,700,000 in standard form
Answer: 5.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 10x + 24
Answer: (x + 6)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 45°. Find opposite
Answer: 14cm -
4. Ratio Mixed ratio problems
Simplify: 16:20:24
Answer: 4:5:6 -
5. Statistics Mean
The mean of 6 numbers is 36. If 5 of them are 32, 21, 41, 44, 39, what is the missing number?
Answer: 39