Keystones — Lintel
Five GCSE retrieval questions · 14 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
30000000
Answer: 3 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 56°. Find opposite
Answer: 28.2cm -
4. Ratio Mixed ratio problems
Simplify the ratio 8m:800cm
Answer: 1:100 -
5. Statistics Mean
The mean of 4 numbers is 25. If 3 of them are 48, 38, 40, what is the missing number?
Answer: -26