Keystones — Lintel
Five GCSE retrieval questions · 30 June 2015 · 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 - 15
Answer: (x + 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 47°. Find opposite. Give your answer to 2 decimal places
Answer: 31.cm -
4. Ratio Mixed ratio problems
Express the first part of 13:14 as a fraction in simplest form
Answer: 13⁄27 -
5. Statistics Mean
Calculate the mean of: 50, 50, 43, 33, 5, 49, 10, 21. Give your answer to 2 decimal places
Answer: 32.63