Keystones — Lintel
Five GCSE retrieval questions · 10 May 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.000024 in standard form
Answer: 2.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 13x + 12
Answer: (x - 1)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 11.3cm -
4. Ratio Mixed ratio problems
Red and blue beads are in the ratio 10:4. What fraction of the beads are blue?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 15, 47, 47, 24, 49, 13, 11. Give your answer to 2 decimal places
Answer: 29.43