Keystones — Lintel
Five GCSE retrieval questions · 3 December 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0051 in standard form
Answer: 5.1 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 27
Answer: (x + 3)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 25cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 22.07cm -
4. Ratio Mixed ratio problems
Divide 96 in the ratio 2:3:1
Answer: 32, 48 and 16 -
5. Statistics Mean
Calculate the mean of: 9, 19, 19, 27, 46, 28, 22. Give your answer to 2 decimal places
Answer: 24.29