Keystones — Lintel
Five GCSE retrieval questions · 14 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0005
Answer: 5 × 10^-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 24
Answer: (x + 8)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 58°. Find opposite
Answer: 43.2cm -
4. Ratio Mixed ratio problems
Divide 232 in the ratio 2:1:1
Answer: 116, 58 and 58 -
5. Statistics Mean
The mean of 5 numbers is 21. If 4 of them are 15, 29, 19, 22, what is the missing number?
Answer: 20