Keystones — Lintel
Five GCSE retrieval questions · 13 May 2014 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 85,000 in standard form
Answer: 8.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 18x + 80
Answer: (x - 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 44°. Find opposite. Give your answer to 2 decimal places
Answer: 25.11cm -
4. Ratio Mixed ratio problems
£217.00 is shared between A and B in the ratio 5:2. How much does A receive?
Answer: £155.00 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 29, 39, 21, what is the missing number?
Answer: 19