Keystones — Lintel
Five GCSE retrieval questions · 6 November 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.045 in standard form
Answer: 4.5 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 80
Answer: (x + 10)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 30cm, angle = 46°. Find opposite. Give your answer to 2 decimal places
Answer: 31.07cm -
4. Ratio Mixed ratio problems
Express the first part of 12:5 as a fraction in simplest form
Answer: 12⁄17 -
5. Statistics Mean
Calculate the mean of: 37, 43, 26, 16, 25, 28, 41. Give your answer to 2 decimal places
Answer: 30.86