Keystones — Lintel
Five GCSE retrieval questions · 23 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0071
Answer: 7.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 59°. Find adjacent side
Answer: 11.3cm -
4. Ratio Mixed ratio problems
Divide 144 in the ratio 3:2:4
Answer: 48, 32 and 64 -
5. Statistics Mean
The mean of 6 numbers is 40. If 5 of them are 30, 21, 24, 32, 50, what is the missing number?
Answer: 83