Keystones — Lintel
Five GCSE retrieval questions · 30 June 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
16000000
Answer: 1.6 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 43°. Find adjacent side
Answer: 16.cm -
4. Ratio Mixed ratio problems
Simplify: 12:4:4
Answer: 3:1:1 -
5. Statistics Mean
The mean of 5 numbers is 38. If 4 of them are 19, 15, 50, 32, what is the missing number?
Answer: 74