Keystones — Lintel
Five GCSE retrieval questions · 7 January 2018 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.00041 in standard form
Answer: 4.1 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² - 9x + 14
Answer: (x - 2)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 45°. Find opposite
Answer: 19cm -
4. Ratio Mixed ratio problems
In ratio 4:6:3, what fraction is the first part?
Answer: 4⁄13 -
5. Statistics Mean
Calculate the mean of: 22, 32, 25, 46, 44, 6, 23. Give your answer to 2 decimal places
Answer: 28.29