Keystones — Lintel
Five GCSE retrieval questions · 22 March 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
54000
Answer: 5.4 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 41°. Find opposite
Answer: 19.cm -
4. Ratio Mixed ratio problems
In ratio 3:2:3, what fraction is the second part?
Answer: 2⁄8 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 36, 42, 35, 20, 27, what is the missing number?
Answer: 50