Keystones — Lintel
Five GCSE retrieval questions · 3 May 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0029 in standard form
Answer: 2.9 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 35cm, angle = 27°. Find adjacent side. Give your answer to 2 decimal places
Answer: 31.19cm -
4. Ratio Mixed ratio problems
Simplify the ratio 5 hours : 40 minutes
Answer: 15:2 -
5. Statistics Mean
Calculate the mean of: 8, 42, 31, 17, 21, 20, 5, 13. Give your answer to 2 decimal places
Answer: 19.63