Keystones — Lintel
Five GCSE retrieval questions · 17 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
570000
Answer: 5.7 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 16
Answer: (x + 8)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 35°. Find opposite
Answer: 20.3cm -
4. Ratio Mixed ratio problems
In ratio 4:1:3, what fraction is the second part?
Answer: 1⁄8 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 15, 29, 25, what is the missing number?
Answer: 71