Keystones — Lintel
Five GCSE retrieval questions · 11 May 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.087 in standard form
Answer: 8.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 7
Answer: (x - 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 20cm, angle = 55°. Find opposite. Give your answer to 2 decimal places
Answer: 28.56cm -
4. Ratio Mixed ratio problems
In ratio 10:7:1, what fraction is the first part?
Answer: 5⁄9 -
5. Statistics Mean
Calculate the mean of: 20, 11, 26, 19, 39, 33, 14. Give your answer to 2 decimal places
Answer: 23.14