Keystones — Lintel
Five GCSE retrieval questions · 6 February 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 500,000,000 in standard form
Answer: 5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 16x + 48
Answer: (x + 12)(x + 4) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 12cm, angle = 51°. Find opposite. Give your answer to 2 decimal places
Answer: 14.82cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 15 minutes
Answer: 4:1 -
5. Statistics Mean
Calculate the mean of: 27, 36, 22, 46, 31, 49, 16. Give your answer to 2 decimal places
Answer: 32.43