Keystones — Lintel
Five GCSE retrieval questions · 10 May 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000013 in standard form
Answer: 1.3 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 36
Answer: (x + 4)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 15.4cm -
4. Ratio Mixed ratio problems
Divide 210 in the ratio 2:2:3
Answer: 60, 60 and 90 -
5. Statistics Mean
Calculate the mean of: 26, 45, 40, 20, 48, 46, 43, 8
Answer: 34.5