Keystones — Lintel
Five GCSE retrieval questions · 29 June 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0061 in standard form
Answer: 6.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 13.38cm -
4. Ratio Mixed ratio problems
Express the second part of 10:11 as a fraction in simplest form
Answer: 11⁄21 -
5. Statistics Mean
Calculate the mean of: 28, 20, 12, 37, 28, 50, 28, 43
Answer: 30.75