Keystones — Lintel
Five GCSE retrieval questions · 4 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
960000
Answer: 9.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 44°. Find adjacent side
Answer: 18.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 6m:600cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 23, 49, 22, 20, what is the missing number?
Answer: 81