Keystones — Lintel
Five GCSE retrieval questions · 21 October 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
7900000
Answer: 7.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 34°. Find opposite
Answer: 8.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 22, 17, 28, 27, 18, what is the missing number?
Answer: 92