Keystones — Lintel
Five GCSE retrieval questions · 28 December 2014 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000018 in standard form
Answer: 1.8 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 8x - 33
Answer: (x + 11)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 41.61cm -
4. Ratio Mixed ratio problems
In ratio 9:11:3, what fraction is the second part?
Answer: 11⁄23 -
5. Statistics Mean
Calculate the mean of: 49, 46, 41, 27, 19, 49
Answer: 38.5