Keystones — Lintel
Five GCSE retrieval questions · 14 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
14000
Answer: 1.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 5
Answer: (x + 5)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 31°. Find opposite
Answer: 9.6cm -
4. Ratio Mixed ratio problems
Simplify: 18:12:6
Answer: 3:2:1 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 40, 17, 28, what is the missing number?
Answer: 67