Keystones — Lintel
Five GCSE retrieval questions · 4 June 2021 · 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 - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 60°. Find opposite
Answer: 24.2cm -
4. Ratio Mixed ratio problems
Simplify: 4:6:8
Answer: 2:3:4 -
5. Statistics Mean
The mean of 5 numbers is 26. If 4 of them are 38, 42, 32, 15, what is the missing number?
Answer: 3