Keystones — Lintel
Five GCSE retrieval questions · 24 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.003
Answer: 3 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 31cm, angle = 55°. Find adjacent side
Answer: 17.8cm -
4. Ratio Mixed ratio problems
Simplify: 6:12:12
Answer: 1:2:2 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 15, 34, 33, 22, what is the missing number?
Answer: 96