Keystones — Lintel
Five GCSE retrieval questions · 20 October 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000094 in standard form
Answer: 9.4 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x - 10
Answer: (x + 1)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 23cm, angle = 57°. Find opposite. Give your answer to 2 decimal places
Answer: 35.42cm -
4. Ratio Mixed ratio problems
In ratio 1:12:9, what fraction is the second part?
Answer: 6⁄11 -
5. Statistics Mean
Calculate the mean of: 24, 37, 30, 29, 37, 47
Answer: 34