Keystones — Lintel
Five GCSE retrieval questions · 20 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.016
Answer: 1.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 36cm, angle = 37°. Find adjacent side
Answer: 28.8cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
The mean of 6 numbers is 23. If 5 of them are 49, 25, 24, 15, 37, what is the missing number?
Answer: -12