Keystones — Lintel
Five GCSE retrieval questions · 4 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00045
Answer: 4.5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 28°. Find adjacent side
Answer: 16.8cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 46, 30, 26, 32, what is the missing number?
Answer: 16