Keystones — Lintel
Five GCSE retrieval questions · 2 December 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.014
Answer: 1.4 × 10^-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 40°. Find opposite
Answer: 22.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 38, 44, 28, 37, 26, what is the missing number?
Answer: 7