Keystones — Lintel
Five GCSE retrieval questions · 19 November 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
9900000
Answer: 9.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 18
Answer: (x - 6)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 58°. Find opposite
Answer: 40cm -
4. Ratio Mixed ratio problems
Simplify: 12:20:12
Answer: 3:5:3 -
5. Statistics Mean
The mean of 4 numbers is 30. If 3 of them are 32, 38, 34, what is the missing number?
Answer: 16