Keystones — Lintel
Five GCSE retrieval questions · 6 March 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 40,000,000 in standard form
Answer: 4 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 6
Answer: (x + 1)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 28cm, angle = 34°. Find opposite. Give your answer to 2 decimal places
Answer: 18.89cm -
4. Ratio Mixed ratio problems
Black and white sweets are in the ratio 12:9. What fraction of the sweets are white?
Answer: 3⁄7 -
5. Statistics Mean
Calculate the mean of: 38, 9, 14, 15, 23, 17, 14. Give your answer to 2 decimal places
Answer: 18.57