Keystones — Lintel
Five GCSE retrieval questions · 17 April 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 290,000 in standard form
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 3x - 28
Answer: (x + 4)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 23cm, angle = 32°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.51cm -
4. Ratio Mixed ratio problems
Simplify the ratio £4 : 45p
Answer: 80:9 -
5. Statistics Mean
Calculate the mean of: 25, 27, 46, 21, 31, 24, 41, 28. Give your answer to 2 decimal places
Answer: 30.38