Keystones — Lintel
Five GCSE retrieval questions · 16 July 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.086 in standard form
Answer: 8.6 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 70
Answer: (x + 7)(x - 10) -
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 the ratio £8 : 40p
Answer: 20:1 -
5. Statistics Mean
Calculate the mean of: 47, 32, 33, 41, 19, 49. Give your answer to 2 decimal places
Answer: 36.83