Keystones — Lintel
Five GCSE retrieval questions · 21 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
1000000
Answer: 1 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 40°. Find adjacent side
Answer: 11.5cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:4
Answer: 2:3:2 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 24, 49, 48, what is the missing number?
Answer: -29