Keystones — Lintel
Five GCSE retrieval questions · 3 April 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 660,000 in standard form
Answer: 6.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 32.91cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3kg : 200g
Answer: 15:1 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 23, 22, 41, 35, 42, what is the missing number?
Answer: 59