Keystones — Lintel
Five GCSE retrieval questions · 17 June 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.052 in standard form
Answer: 5.2 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.03cm -
4. Ratio Mixed ratio problems
Express the second part of 6:7 as a fraction in simplest form
Answer: 7⁄13 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 47, 20, 21, 43, what is the missing number?
Answer: 34