Keystones — Lintel
Five GCSE retrieval questions · 30 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
28000
Answer: 2.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 15
Answer: (x + 5)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 35°. Find adjacent side
Answer: 20.5cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5m:500cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 45, 30, 24, 41, what is the missing number?
Answer: -30