Keystones — Lintel
Five GCSE retrieval questions · 2 May 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
850000
Answer: 8.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 50°. Find opposite
Answer: 34.6cm -
4. Ratio Mixed ratio problems
Simplify: 8:8:20
Answer: 2:2:5 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 20, 35, 41, 43, what is the missing number?
Answer: 11