Keystones — Lintel
Five GCSE retrieval questions · 17 April 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0082
Answer: 8.2 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 59°. Find adjacent side
Answer: 14.9cm -
4. Ratio Mixed ratio problems
Express the first part of 4:5 as a fraction in simplest form
Answer: 4⁄9 -
5. Statistics Mean
The mean of 4 numbers is 36. If 3 of them are 20, 29, 43, what is the missing number?
Answer: 52