Keystones — Lintel
Five GCSE retrieval questions · 17 April 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
930000
Answer: 9.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 17cm, angle = 59°. Find opposite
Answer: 28.3cm -
4. Ratio Mixed ratio problems
In ratio 4:3:1, what fraction is the second part?
Answer: 3⁄8 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 21, 37, 34, what is the missing number?
Answer: 48