Keystones — Lintel
Five GCSE retrieval questions · 3 February 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.046
Answer: 4.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 25
Answer: (x - 5)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 57°. Find opposite
Answer: 26.2cm -
4. Ratio Mixed ratio problems
In ratio 3:3:2, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
The mean of 4 numbers is 34. If 3 of them are 25, 32, 48, what is the missing number?
Answer: 31