Keystones — Lintel
Five GCSE retrieval questions · 4 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
51000
Answer: 5.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 54°. Find adjacent side
Answer: 20cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 49, 27, 42, what is the missing number?
Answer: 38