Keystones — Lintel
Five GCSE retrieval questions · 10 November 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
4800000
Answer: 4.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 30°. Find opposite
Answer: 6.9cm -
4. Ratio Mixed ratio problems
Express the first part of 4:6 as a fraction in simplest form
Answer: 2⁄5 -
5. Statistics Mean
The mean of 5 numbers is 39. If 4 of them are 18, 16, 35, 37, what is the missing number?
Answer: 89