Keystones — Lintel
Five GCSE retrieval questions · 16 May 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.056 in standard form
Answer: 5.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x + 14
Answer: (x + 7)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 33cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places
Answer: 26.35cm -
4. Ratio Mixed ratio problems
Black, white and yellow marbles are in the ratio 9:1:4. What fraction of the marbles are black?
Answer: 9⁄14 -
5. Statistics Mean
Calculate the mean of: 14, 33, 6, 13, 19, 41
Answer: 21