Keystones — Lintel
Five GCSE retrieval questions · 25 August 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
460000
Answer: 4.6 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 34°. Find opposite
Answer: 14.8cm -
4. Ratio Mixed ratio problems
Express the first part of 6:4 as a fraction in simplest form
Answer: 3⁄5 -
5. Statistics Mean
The mean of 5 numbers is 27. If 4 of them are 42, 28, 40, 19, what is the missing number?
Answer: 6