Keystones — Lintel
Five GCSE retrieval questions · 8 August 2019 · mathsvault.uk/keystones
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1. Number Converting to standard form
57000
Answer: 5.7 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 2)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 34°. Find opposite
Answer: 15.5cm -
4. Ratio Mixed ratio problems
Express the first part of 3:5 as a fraction in simplest form
Answer: 3⁄8 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 37, 41, 16, 34, what is the missing number?
Answer: 7