Keystones — Lintel
Five GCSE retrieval questions · 21 June 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 62,000 in standard form
Answer: 6.2 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 28
Answer: (x + 7)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 40°. Find opposite. Give your answer to 2 decimal places
Answer: 8.39cm -
4. Ratio Mixed ratio problems
Black and white counters are in the ratio 5:10. What fraction of the counters are black?
Answer: 1⁄3 -
5. Statistics Mean
Calculate the mean of: 33, 10, 6, 43, 38, 50, 26. Give your answer to 2 decimal places
Answer: 29.43