Keystones — Lintel
Five GCSE retrieval questions · 10 April 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 92,000,000 in standard form
Answer: 9.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 14x + 48
Answer: (x - 6)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 38°. Find opposite. Give your answer to 2 decimal places
Answer: 12.5cm -
4. Ratio Mixed ratio problems
In ratio 7:8:8, what fraction is the first part?
Answer: 7⁄23 -
5. Statistics Mean
Calculate the mean of: 23, 38, 32, 6, 22, 9. Give your answer to 2 decimal places
Answer: 21.67