Keystones — Lintel
Five GCSE retrieval questions · 12 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0084
Answer: 8.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 34°. Find opposite
Answer: 18.2cm -
4. Ratio Mixed ratio problems
Simplify: 12:24:8
Answer: 3:6:2 -
5. Statistics Mean
The mean of 4 numbers is 38. If 3 of them are 50, 26, 49, what is the missing number?
Answer: 27