Keystones — Lintel
Five GCSE retrieval questions · 3 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.084
Answer: 8.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 17cm, angle = 37°. Find adjacent side
Answer: 13.6cm -
4. Ratio Mixed ratio problems
Simplify: 8:12:4
Answer: 2:3:1 -
5. Statistics Mean
The mean of 4 numbers is 27. If 3 of them are 20, 38, 41, what is the missing number?
Answer: 9