Keystones — Lintel
Five GCSE retrieval questions · 6 January 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.069
Answer: 6.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 14cm, angle = 37°. Find opposite
Answer: 10.5cm -
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 4 numbers is 33. If 3 of them are 34, 27, 28, what is the missing number?
Answer: 43