Keystones — Lintel
Five GCSE retrieval questions · 4 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
260000
Answer: 2.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 40°. Find adjacent side
Answer: 22.2cm -
4. Ratio Mixed ratio problems
Simplify: 8:16:16
Answer: 1:2:2 -
5. Statistics Mean
The mean of 6 numbers is 22. If 5 of them are 27, 49, 26, 36, 22, what is the missing number?
Answer: -28