Keystones — Lintel
Five GCSE retrieval questions · 15 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
21000000
Answer: 2.1 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 41°. Find adjacent side
Answer: 18.9cm -
4. Ratio Mixed ratio problems
Simplify: 15:9:6
Answer: 5:3:2 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 20, 34, 27, what is the missing number?
Answer: 75