Keystones — Lintel
Five GCSE retrieval questions · 20 December 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0059 in standard form
Answer: 5.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 90
Answer: (x + 9)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 38°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.18cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2kg : 450g
Answer: 40:9 -
5. Statistics Mean
Calculate the mean of: 15, 49, 23, 16, 31, 18, 36, 17. Give your answer to 2 decimal places
Answer: 25.63