Keystones — Lintel
Five GCSE retrieval questions · 31 October 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 9,200,000 in standard form
Answer: 9.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 14
Answer: (x + 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 10.16cm -
4. Ratio Mixed ratio problems
In ratio 9:7:4, what fraction is the first part?
Answer: 9⁄20 -
5. Statistics Mean
Calculate the mean of: 35, 39, 11, 33, 48, 29, 10. Give your answer to 2 decimal places
Answer: 29.29