Keystones — Lintel
Five GCSE retrieval questions · 6 February 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.00012 in standard form
Answer: 1.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 60
Answer: (x + 5)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 35.75cm -
4. Ratio Mixed ratio problems
£170.00 is shared between A and B in the ratio 3:2. How much does A receive?
Answer: £102.00 -
5. Statistics Mean
Calculate the mean of: 9, 36, 14, 15, 35, 21. Give your answer to 2 decimal places
Answer: 21.67