Keystones — Lintel
Five GCSE retrieval questions · 13 November 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00096 in standard form
Answer: 9.6 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 108
Answer: (x + 9)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 42°. Find opposite. Give your answer to 2 decimal places
Answer: 9cm -
4. Ratio Mixed ratio problems
Divide 171 in the ratio 3:2:4
Answer: 57, 38 and 76 -
5. Statistics Mean
Calculate the mean of: 45, 18, 20, 7, 14, 34, 6, 49. Give your answer to 2 decimal places
Answer: 24.13