Keystones — Lintel
Five GCSE retrieval questions · 28 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
18000
Answer: 1.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 34°. Find opposite
Answer: 8.cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:9
Answer: 4:2:3 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 34, 25, 46, what is the missing number?
Answer: 55