Keystones — Lintel
Five GCSE retrieval questions · 3 August 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 230,000 in standard form
Answer: 2.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 5x - 24
Answer: (x + 3)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 8.59cm -
4. Ratio Mixed ratio problems
Black, white and yellow counters are in the ratio 5:11:10. What fraction of the counters are white?
Answer: 11⁄26 -
5. Statistics Mean
Calculate the mean of: 46, 35, 18, 20, 19, 36
Answer: 29