Keystones — Lintel
Five GCSE retrieval questions · 15 February 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000091 in standard form
Answer: 9.1 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 16x + 64
Answer: (x - 8)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 40°. Find adjacent side. Give your answer to 2 decimal places
Answer: 18.39cm -
4. Ratio Mixed ratio problems
Simplify: 24:20:8
Answer: 6:5:2 -
5. Statistics Mean
Calculate the mean of: 37, 39, 6, 11, 41, 32. Give your answer to 2 decimal places
Answer: 27.67