Keystones — Lintel
Five GCSE retrieval questions · 26 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7000000
Answer: 7 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 12
Answer: (x - 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 27cm, angle = 46°. Find opposite
Answer: 28cm -
4. Ratio Mixed ratio problems
Simplify: 6:12:9
Answer: 2:4:3 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 41, 44, 49, what is the missing number?
Answer: 22