Keystones — Lintel
Five GCSE retrieval questions · 10 August 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 680,000 in standard form
Answer: 6.8 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 11.92cm -
4. Ratio Mixed ratio problems
Simplify the ratio £9 : 45p
Answer: 20:1 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 41, 17, 20, what is the missing number?
Answer: 42