Keystones — Lintel
Five GCSE retrieval questions · 27 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0044
Answer: 4.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 46°. Find opposite
Answer: 22.8cm -
4. Ratio Mixed ratio problems
In ratio 3:1:4, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
The mean of 6 numbers is 28. If 5 of them are 45, 26, 42, 30, 45, what is the missing number?
Answer: -20