Keystones — Lintel
Five GCSE retrieval questions · 13 December 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000078 in standard form
Answer: 7.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 35
Answer: (x + 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 29°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.49cm -
4. Ratio Mixed ratio problems
£287.00 is shared between A and B in the ratio 3:4. How much does A receive?
Answer: £123.00 -
5. Statistics Mean
Calculate the mean of: 8, 8, 34, 44, 43, 49, 14, 15. Give your answer to 2 decimal places
Answer: 26.88