Keystones — Lintel
Five GCSE retrieval questions · 21 October 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0054 in standard form
Answer: 5.4 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x - 9
Answer: (x + 1)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 35°. Find opposite. Give your answer to 2 decimal places
Answer: 13.3cm -
4. Ratio Mixed ratio problems
Divide 174 in the ratio 1:2:3
Answer: 29, 58 and 87 -
5. Statistics Mean
Calculate the mean of: 45, 8, 31, 11, 15, 29, 33, 49. Give your answer to 2 decimal places
Answer: 27.63