Keystones — Lintel
Five GCSE retrieval questions · 25 December 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.067 in standard form
Answer: 6.7 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 7
Answer: (x + 1)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 32cm, angle = 63°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.53cm -
4. Ratio Mixed ratio problems
Simplify: 9:12:12
Answer: 3:4:4 -
5. Statistics Mean
Calculate the mean of: 12, 28, 17, 47, 41, 34, 16, 30. Give your answer to 2 decimal places
Answer: 28.13