Keystones — Lintel
Five GCSE retrieval questions · 23 May 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00058
Answer: 5.8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 42
Answer: (x + 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 59°. Find adjacent side
Answer: 8.2cm -
4. Ratio Mixed ratio problems
Simplify: 18:18:9
Answer: 2:2:1 -
5. Statistics Mean
The mean of 6 numbers is 39. If 5 of them are 32, 50, 35, 37, 20, what is the missing number?
Answer: 60