Keystones — Lintel
Five GCSE retrieval questions · 29 October 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 5,200,000 in standard form
Answer: 5.2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 12
Answer: (x + 2)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.6cm -
4. Ratio Mixed ratio problems
Express the first part of 9:5 as a fraction in simplest form
Answer: 9⁄14 -
5. Statistics Mean
Calculate the mean of: 9, 48, 32, 48, 49, 13, 20, 32. Give your answer to 2 decimal places
Answer: 31.38