Keystones — Lintel
Five GCSE retrieval questions · 9 April 2017 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 150,000,000 in standard form
Answer: 1.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 32
Answer: (x + 4)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.54cm -
4. Ratio Mixed ratio problems
£414.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £230.00 -
5. Statistics Mean
Calculate the mean of: 8, 48, 32, 45, 17, 38, 7, 15
Answer: 26.25