Keystones — Lintel
Five GCSE retrieval questions · 23 September 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000065 in standard form
Answer: 6.5 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 110
Answer: (x + 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 37cm, angle = 46°. Find adjacent side. Give your answer to 2 decimal places
Answer: 25.7cm -
4. Ratio Mixed ratio problems
Simplify the ratio 4 hours : 10 minutes
Answer: 24:1 -
5. Statistics Mean
Calculate the mean of: 20, 38, 17, 33, 30, 35, 14. Give your answer to 2 decimal places
Answer: 26.71