Keystones — Lintel
Five GCSE retrieval questions · 30 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
11000
Answer: 1.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 20
Answer: (x - 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 37°. Find adjacent side
Answer: 14.4cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:6
Answer: 2:3:3 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 46, 25, 27, 18, 19, what is the missing number?
Answer: 69