Keystones — Lintel
Five GCSE retrieval questions · 12 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.076
Answer: 7.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 43°. Find adjacent side
Answer: 27.cm -
4. Ratio Mixed ratio problems
Express the first part of 5:4 as a fraction in simplest form
Answer: 5⁄9 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 44, 45, 42, 16, what is the missing number?
Answer: 28