Keystones — Lintel
Five GCSE retrieval questions · 26 July 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00022 in standard form
Answer: 2.2 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 108
Answer: (x + 9)(x - 12) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 30cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.54cm -
4. Ratio Mixed ratio problems
In ratio 10:6:8, what fraction is the first part?
Answer: 5⁄12 -
5. Statistics Mean
Calculate the mean of: 33, 19, 34, 44, 50, 38, 29. Give your answer to 2 decimal places
Answer: 35.29