Keystones — Lintel
Five GCSE retrieval questions · 30 April 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.024 in standard form
Answer: 2.4 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 12
Answer: (x + 3)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 22cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.54cm -
4. Ratio Mixed ratio problems
Express the first part of 5:9 as a fraction in simplest form
Answer: 5⁄14 -
5. Statistics Mean
Calculate the mean of: 9, 13, 47, 14, 35, 19. Give your answer to 2 decimal places
Answer: 22.83