Keystones — Lintel
Five GCSE retrieval questions · 1 September 2021 · mathsvault.uk/keystones
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1. Number Converting to standard form
23000
Answer: 2.3 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 59°. Find opposite
Answer: 33.3cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 5 numbers is 40. If 4 of them are 47, 23, 27, 39, what is the missing number?
Answer: 64