Keystones — Lintel
Five GCSE retrieval questions · 2 October 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0035 in standard form
Answer: 3.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 27.88cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 30 minutes
Answer: 10:1 -
5. Statistics Mean
Calculate the mean of: 44, 21, 28, 26, 40, 39, 28. Give your answer to 2 decimal places
Answer: 32.29