Keystones — Lintel
Five GCSE retrieval questions · 29 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.079
Answer: 7.9 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 30
Answer: (x + 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 59°. Find opposite
Answer: 16.6cm -
4. Ratio Mixed ratio problems
In ratio 4:4:3, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 49, 43, 39, 42, 34, what is the missing number?
Answer: -33