Keystones — Lintel
Five GCSE retrieval questions · 14 November 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0035 in standard form
Answer: 3.5 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 20
Answer: (x - 2)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 50°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.5cm -
4. Ratio Mixed ratio problems
Divide 85 in the ratio 1:1:3
Answer: 17, 17 and 51 -
5. Statistics Mean
Calculate the mean of: 18, 24, 20, 14, 10, 15, 37, 37. Give your answer to 2 decimal places
Answer: 21.88