Keystones — Lintel
Five GCSE retrieval questions · 20 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
900000
Answer: 9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 42
Answer: (x - 7)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 49°. Find adjacent side
Answer: 17.cm -
4. Ratio Mixed ratio problems
Simplify: 10:6:12
Answer: 5:3:6 -
5. Statistics Mean
The mean of 6 numbers is 38. If 5 of them are 43, 39, 21, 39, 37, what is the missing number?
Answer: 49