Keystones — Lintel
Five GCSE retrieval questions · 9 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0069
Answer: 6.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 34°. Find adjacent side
Answer: 23.2cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:9
Answer: 4:2:3 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 28, 38, 27, 40, 49, what is the missing number?
Answer: 28