Keystones — Lintel
Five GCSE retrieval questions · 29 September 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.025
Answer: 2.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 10x + 24
Answer: (x - 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 49°. Find adjacent side
Answer: 24.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 31. If 4 of them are 41, 37, 35, 33, what is the missing number?
Answer: 9