Keystones — Lintel
Five GCSE retrieval questions · 24 January 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
65000
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 55°. Find adjacent side
Answer: 16.6cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 30. If 5 of them are 28, 19, 48, 46, 24, what is the missing number?
Answer: 15