Keystones — Lintel
Five GCSE retrieval questions · 20 June 2015 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 81,000 in standard form
Answer: 8.1 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 6x - 7
Answer: (x + 7)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 33°. Find opposite. Give your answer to 2 decimal places
Answer: 10.39cm -
4. Ratio Mixed ratio problems
Red, blue and green beads are in the ratio 2:2:6. What fraction of the beads are blue?
Answer: 1⁄5 -
5. Statistics Mean
Calculate the mean of: 48, 12, 32, 48, 6, 26. Give your answer to 2 decimal places
Answer: 28.67