Keystones — Lintel
Five GCSE retrieval questions · 1 May 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.079 in standard form
Answer: 7.9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 35
Answer: (x + 7)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 25cm, angle = 58°. Find opposite. Give your answer to 2 decimal places
Answer: 40.01cm -
4. Ratio Mixed ratio problems
Simplify: 16:16:24
Answer: 2:2:3 -
5. Statistics Mean
Calculate the mean of: 30, 47, 14, 9, 14, 44, 8. Give your answer to 2 decimal places
Answer: 23.71