Keystones — Lintel
Five GCSE retrieval questions · 30 July 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 3,600,000 in standard form
Answer: 3.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 45°. Find opposite
Answer: 10cm -
4. Ratio Mixed ratio problems
In ratio 10:2:5, what fraction is the second part?
Answer: 2⁄17 -
5. Statistics Mean
Calculate the mean of: 27, 14, 20, 12, 41, 48, 41, 44. Give your answer to 2 decimal places
Answer: 30.88