Keystones — Lintel
Five GCSE retrieval questions · 24 October 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 140,000,000 in standard form
Answer: 1.4 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 12x + 20
Answer: (x + 10)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 45.03cm -
4. Ratio Mixed ratio problems
Simplify the ratio 2 hours : 30 minutes
Answer: 4:1 -
5. Statistics Mean
Calculate the mean of: 38, 36, 44, 16, 47, 45. Give your answer to 2 decimal places
Answer: 37.67