Keystones — Lintel
Five GCSE retrieval questions · 7 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
7300000
Answer: 7.3 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 65°. Find adjacent side
Answer: 9.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 36. If 4 of them are 35, 41, 31, 50, what is the missing number?
Answer: 23