Keystones — Lintel
Five GCSE retrieval questions · 11 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0056
Answer: 5.6 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 29°. Find adjacent side
Answer: 25.4cm -
4. Ratio Mixed ratio problems
Simplify: 4:8:10
Answer: 2:4:5 -
5. Statistics Mean
The mean of 6 numbers is 20. If 5 of them are 43, 31, 39, 30, 28, what is the missing number?
Answer: -51