Keystones — Lintel
Five GCSE retrieval questions · 29 April 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.000019 in standard form
Answer: 1.9 × 10-5 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 11cm, angle = 36°. Find opposite. Give your answer to 2 decimal places
Answer: 7.99cm -
4. Ratio Mixed ratio problems
Simplify: 12:6:15
Answer: 4:2:5 -
5. Statistics Mean
Calculate the mean of: 40, 48, 43, 33, 36, 48. Give your answer to 2 decimal places
Answer: 41.33