Keystones — Lintel
Five GCSE retrieval questions · 23 May 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
37000
Answer: 3.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 34°. Find opposite
Answer: 19.6cm -
4. Ratio Mixed ratio problems
In ratio 1:1:2, what fraction is the second part?
Answer: 1⁄4 -
5. Statistics Mean
The mean of 4 numbers is 22. If 3 of them are 44, 40, 37, what is the missing number?
Answer: -33