Keystones — Lintel
Five GCSE retrieval questions · 30 March 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 75,000 in standard form
Answer: 7.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 40
Answer: (x + 10)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 17.44cm -
4. Ratio Mixed ratio problems
£378.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £168.00 -
5. Statistics Mean
Calculate the mean of: 15, 39, 19, 19, 25, 6
Answer: 20.5