Keystones — Lintel
Five GCSE retrieval questions · 10 August 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 + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 50°. Find opposite
Answer: 34.6cm -
4. Ratio Mixed ratio problems
Simplify: 6:18:15
Answer: 2:6:5 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 39, 32, 31, 26, 30, what is the missing number?
Answer: 10