Keystones — Lintel
Five GCSE retrieval questions · 19 November 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.037
Answer: 3.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x + 6
Answer: (x - 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 49°. Find opposite
Answer: 20.7cm -
4. Ratio Mixed ratio problems
Divide 84 in the ratio 3:1:3
Answer: 36, 12 and 36 -
5. Statistics Mean
The mean of 6 numbers is 33. If 5 of them are 29, 44, 33, 39, 47, what is the missing number?
Answer: 6