Keystones — Lintel
Five GCSE retrieval questions · 28 February 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.073
Answer: 7.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x + 4
Answer: (x - 2)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 44°. Find opposite
Answer: 24.cm -
4. Ratio Mixed ratio problems
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics Mean
The mean of 6 numbers is 34. If 5 of them are 39, 36, 22, 43, 33, what is the missing number?
Answer: 31