Keystones — Lintel
Five GCSE retrieval questions · 30 April 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00008 in standard form
Answer: 8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 16cm, angle = 39°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.43cm -
4. Ratio Mixed ratio problems
Simplify: 6:10:10
Answer: 3:5:5 -
5. Statistics Mean
Calculate the mean of: 12, 49, 33, 5, 27, 28, 25. Give your answer to 2 decimal places
Answer: 25.57