Keystones — Lintel
Five GCSE retrieval questions · 9 October 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.089
Answer: 8.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 36
Answer: (x - 6)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 34°. Find adjacent side
Answer: 24.9cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 27, 38, 26, 30, 41, what is the missing number?
Answer: 36