Keystones — Lintel
Five GCSE retrieval questions · 26 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0074
Answer: 7.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 57°. Find adjacent side
Answer: 10.3cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:16
Answer: 4:3:4 -
5. Statistics Mean
The mean of 5 numbers is 22. If 4 of them are 32, 31, 25, 49, what is the missing number?
Answer: -27