Keystones — Lintel
Five GCSE retrieval questions · 7 May 2016 · 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 - 56
Answer: (x + 8)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 25.21cm -
4. Ratio Mixed ratio problems
Black and white sweets are in the ratio 4:2. What fraction of the sweets are white?
Answer: 1⁄3 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 37, 20, 42, 17, what is the missing number?
Answer: 34