Keystones — Lintel
Five GCSE retrieval questions · 20 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.058 in standard form
Answer: 5.8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 20
Answer: (x + 4)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 59°. Find opposite. Give your answer to 2 decimal places
Answer: 49.93cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £112.00 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 25, 47, 49, what is the missing number?
Answer: 35