Keystones — Lintel
Five GCSE retrieval questions · 1 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
12000
Answer: 1.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 64°. Find adjacent side
Answer: 11cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 33. If 4 of them are 32, 24, 46, 45, what is the missing number?
Answer: 18