Keystones — Lintel
Five GCSE retrieval questions · 9 January 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0007 in standard form
Answer: 7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 59°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.27cm -
4. Ratio Mixed ratio problems
Simplify: 6:12:9
Answer: 2:4:3 -
5. Statistics Mean
Calculate the mean of: 5, 19, 36, 50, 44, 19. Give your answer to 2 decimal places
Answer: 28.83