Keystones — Lintel
Five GCSE retrieval questions · 8 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000026 in standard form
Answer: 2.6 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x - 18
Answer: (x + 2)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 44°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.9cm -
4. Ratio Mixed ratio problems
Black, white and yellow sweets are in the ratio 9:5:12. What fraction of the sweets are black?
Answer: 9⁄26 -
5. Statistics Mean
Calculate the mean of: 45, 34, 19, 8, 29, 20, 10, 30. Give your answer to 2 decimal places
Answer: 24.38