Keystones — Lintel
Five GCSE retrieval questions · 8 November 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 28,000 in standard form
Answer: 2.8 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 55
Answer: (x + 5)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 33.36cm -
4. Ratio Mixed ratio problems
Orange, purple and pink beads are in the ratio 7:11:3. What fraction of the beads are orange?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 49, 39, 36, 42, 26, 38, 46, 8
Answer: 35.5