Keystones — Lintel
Five GCSE retrieval questions · 14 November 2024 · mathsvault.uk/keystones
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1. Number Converting to standard form
17000000
Answer: 1.7 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 42°. Find opposite
Answer: 27cm -
4. Ratio Mixed ratio problems
Divide 112 in the ratio 1:4:2
Answer: 16, 64 and 32 -
5. Statistics Mean
The mean of 4 numbers is 28. If 3 of them are 46, 28, 50, what is the missing number?
Answer: -12