Keystones — Lintel
Five GCSE retrieval questions · 18 August 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
3100000
Answer: 3.1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 65°. Find adjacent side
Answer: 6.8cm -
4. Ratio Mixed ratio problems
Simplify: 6:4:8
Answer: 3:2:4 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 25, 41, 23, 35, what is the missing number?
Answer: 41