Keystones — Lintel
Five GCSE retrieval questions · 23 March 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
27000
Answer: 2.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 20
Answer: (x + 5)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 47°. Find opposite
Answer: 11.8cm -
4. Ratio Mixed ratio problems
Simplify: 20:16:12
Answer: 5:4:3 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 29, 32, 46, 32, 50, what is the missing number?
Answer: 15