Keystones — Lintel
Five GCSE retrieval questions · 27 November 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 78,000 in standard form
Answer: 7.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 120
Answer: (x + 10)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 34.28cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 35, 45, 35, what is the missing number?
Answer: 37