Keystones — Lintel
Five GCSE retrieval questions · 13 April 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.08
Answer: 8 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 14
Answer: (x + 7)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 24cm, angle = 58°. Find opposite
Answer: 38.4cm -
4. Ratio Mixed ratio problems
In ratio 2:4:3, what fraction is the second part?
Answer: 4⁄9 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 16, 28, 26, what is the missing number?
Answer: 54