Keystones — Lintel
Five GCSE retrieval questions · 14 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 330,000 in standard form
Answer: 3.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 11x - 12
Answer: (x + 12)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 21cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 25.93cm -
4. Ratio Mixed ratio problems
Simplify: 6:10:10
Answer: 3:5:5 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 19, 26, 19, 48, 30, what is the missing number?
Answer: 32