Keystones — Lintel
Five GCSE retrieval questions · 29 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0088
Answer: 8.8 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 27cm, angle = 34°. Find adjacent side
Answer: 22.4cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 21, 32, 28, 47, 19, what is the missing number?
Answer: -3