Keystones — Lintel
Five GCSE retrieval questions · 25 June 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
540000
Answer: 5.4 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 54°. Find adjacent side
Answer: 15.9cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:8
Answer: 3:5:2 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 32, 34, 29, 46, what is the missing number?
Answer: 54