Keystones — Lintel
Five GCSE retrieval questions · 12 November 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
93000
Answer: 9.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 21
Answer: (x - 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 27°. Find adjacent side
Answer: 22.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 35, 39, 17, 41, what is the missing number?
Answer: 53