Keystones — Lintel
Five GCSE retrieval questions · 25 June 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
360000
Answer: 3.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 12
Answer: (x - 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 38°. Find opposite
Answer: 7.8cm -
4. Ratio Mixed ratio problems
In ratio 3:4:4, what fraction is the second part?
Answer: 4⁄11 -
5. Statistics Mean
The mean of 4 numbers is 37. If 3 of them are 16, 27, 27, what is the missing number?
Answer: 78