Keystones — Lintel
Five GCSE retrieval questions · 4 May 2013 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.033 in standard form
Answer: 3.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 19x + 88
Answer: (x + 11)(x + 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 15.49cm -
4. Ratio Mixed ratio problems
Black, white and yellow beads are in the ratio 12:8:8. What fraction of the beads are yellow?
Answer: 2⁄7 -
5. Statistics Mean
Calculate the mean of: 11, 24, 17, 18, 32, 28, 31, 44. Give your answer to 2 decimal places
Answer: 25.63