Keystones — Lintel
Five GCSE retrieval questions · 24 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0027
Answer: 2.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 59°. Find opposite
Answer: 36.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 32. If 4 of them are 50, 46, 19, 45, what is the missing number?
Answer: 0