Keystones — Lintel
Five GCSE retrieval questions · 19 March 2018 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.00013
Answer: 1.3 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 5x - 6
Answer: (x + 6)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 40°. Find opposite
Answer: 21.8cm -
4. Ratio Mixed ratio problems
Express the first part of 3:6 as a fraction in simplest form
Answer: 1⁄3 -
5. Statistics Mean
The mean of 5 numbers is 35. If 4 of them are 32, 26, 47, 18, what is the missing number?
Answer: 52