Keystones — Lintel
Five GCSE retrieval questions · 18 April 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
88000000
Answer: 8.8 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 34cm, angle = 59°. Find adjacent side
Answer: 17.5cm -
4. Ratio Mixed ratio problems
Express the first part of 2:3 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
The mean of 6 numbers is 25. If 5 of them are 30, 33, 15, 36, 21, what is the missing number?
Answer: 15