Keystones — Lintel
Five GCSE retrieval questions · 16 October 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0066
Answer: 6.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 44°. Find adjacent side
Answer: 23.7cm -
4. Ratio Mixed ratio problems
Simplify: 6:12:18
Answer: 1:2:3 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 28, 32, 38, 26, 42, what is the missing number?
Answer: 74