Keystones — Lintel
Five GCSE retrieval questions · 8 September 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 60,000 in standard form
Answer: 6 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 4
Answer: (x + 4)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 35.21cm -
4. Ratio Mixed ratio problems
Orange and purple beads are in the ratio 2:7. What fraction of the beads are purple?
Answer: 7⁄9 -
5. Statistics Mean
Calculate the mean of: 15, 27, 47, 20, 35, 23, 38. Give your answer to 2 decimal places
Answer: 29.29