Keystones — Lintel
Five GCSE retrieval questions · 4 September 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0008 in standard form
Answer: 8 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 9x + 14
Answer: (x + 7)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 31°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.72cm -
4. Ratio Mixed ratio problems
Express the second part of 11:10 as a fraction in simplest form
Answer: 10⁄21 -
5. Statistics Mean
Calculate the mean of: 50, 18, 29, 22, 42, 40, 20, 14. Give your answer to 2 decimal places
Answer: 29.38