Keystones — Lintel
Five GCSE retrieval questions · 4 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
9700000
Answer: 9.7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 26°. Find adjacent side
Answer: 19.8cm -
4. Ratio Mixed ratio problems
Simplify: 18:15:12
Answer: 6:5:4 -
5. Statistics Mean
The mean of 4 numbers is 33. If 3 of them are 36, 40, 16, what is the missing number?
Answer: 40