Keystones — Lintel
Five GCSE retrieval questions · 18 August 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.06
Answer: 6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 59°. Find adjacent side
Answer: 18cm -
4. Ratio Mixed ratio problems
Simplify: 16:8:20
Answer: 4:2:5 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 31, 30, 23, what is the missing number?
Answer: 36