Keystones — Lintel
Five GCSE retrieval questions · 14 January 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0069 in standard form
Answer: 6.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 30
Answer: (x + 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 56°. Find opposite. Give your answer to 2 decimal places
Answer: 42.99cm -
4. Ratio Mixed ratio problems
Simplify: 20:24:8
Answer: 5:6:2 -
5. Statistics Mean
Calculate the mean of: 41, 16, 50, 46, 45, 31. Give your answer to 2 decimal places
Answer: 38.17