Keystones — Lintel
Five GCSE retrieval questions · 9 December 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0014
Answer: 1.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 65°. Find adjacent side
Answer: 12.7cm -
4. Ratio Mixed ratio problems
Simplify: 18:18:12
Answer: 3:3:2 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 46, 49, 16, 19, what is the missing number?
Answer: 0