Keystones — Lintel
Five GCSE retrieval questions · 3 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
1200000
Answer: 1.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 18
Answer: (x + 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 54°. Find adjacent side
Answer: 10.6cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:10
Answer: 2:2:5 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 19, 34, 46, what is the missing number?
Answer: 53