Keystones — Lintel
Five GCSE retrieval questions · 25 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
99000000
Answer: 9.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 21
Answer: (x + 7)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 31°. Find opposite
Answer: 16.8cm -
4. Ratio Mixed ratio problems
Express the first part of 6:2 as a fraction in simplest form
Answer: 3⁄4 -
5. Statistics Mean
Calculate the mean of: 35, 31, 40, 16, 8, 49
Answer: 29.8