Keystones — Lintel
Five GCSE retrieval questions · 7 July 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.026
Answer: 2.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 34°. Find opposite
Answer: 8.cm -
4. Ratio Mixed ratio problems
Simplify: 16:12:24
Answer: 4:3:6 -
5. Statistics Mean
The mean of 6 numbers is 29. If 5 of them are 38, 41, 23, 18, 37, what is the missing number?
Answer: 17