Keystones — Lintel
Five GCSE retrieval questions · 1 July 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.032 in standard form
Answer: 3.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 8
Answer: (x + 8)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 12.59cm -
4. Ratio Mixed ratio problems
£182.00 is shared between A and B in the ratio 2:5. How much does A receive?
Answer: £52.00 -
5. Statistics Mean
The mean of 5 numbers is 34. If 4 of them are 24, 45, 26, 38, what is the missing number?
Answer: 37