Keystones — Lintel
Five GCSE retrieval questions · 25 October 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 65,000 in standard form
Answer: 6.5 × 104 -
2. Algebra Factorising monic quadratics
Factorise: x² - 2x - 80
Answer: (x + 8)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 53°. Find opposite. Give your answer to 2 decimal places
Answer: 29.19cm -
4. Ratio Mixed ratio problems
Divide 65 in the ratio 1:1:3
Answer: 13, 13 and 39 -
5. Statistics Mean
Calculate the mean of: 46, 41, 38, 39, 49, 21
Answer: 39