Keystones — Lintel
Five GCSE retrieval questions · 8 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00056
Answer: 5.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 33°. Find adjacent side
Answer: 18.5cm -
4. Ratio Mixed ratio problems
Simplify: 6:15:9
Answer: 2:5:3 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 44, 23, 44, what is the missing number?
Answer: -11