Keystones — Lintel
Five GCSE retrieval questions · 20 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.091
Answer: 9.1 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 41°. Find opposite
Answer: 8.7cm -
4. Ratio Mixed ratio problems
In ratio 1:3:4, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
The mean of 5 numbers is 30. If 4 of them are 19, 46, 49, 36, what is the missing number?
Answer: 0