Keystones — Lintel
Five GCSE retrieval questions · 28 September 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0093
Answer: 9.3 × 10^-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 30
Answer: (x - 6)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 44°. Find opposite
Answer: 28cm -
4. Ratio Mixed ratio problems
In ratio 3:1:1, what fraction is the second part?
Answer: 1⁄5 -
5. Statistics Mean
The mean of 4 numbers is 40. If 3 of them are 34, 41, 44, what is the missing number?
Answer: 41