Keystones — Lintel
Five GCSE retrieval questions · 1 August 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 15,000,000 in standard form
Answer: 1.5 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 16.05cm -
4. Ratio Mixed ratio problems
Simplify the ratio £2 : 10p
Answer: 20:1 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 38, 44, 18, what is the missing number?
Answer: 16