Keystones — Lintel
Five GCSE retrieval questions · 7 August 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 250,000,000 in standard form
Answer: 2.5 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 10
Answer: (x + 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 16cm, angle = 60°. Find opposite. Give your answer to 2 decimal places
Answer: 27.71cm -
4. Ratio Mixed ratio problems
£216.00 is shared between A and B in the ratio 4:5. How much does A receive?
Answer: £96.00 -
5. Statistics Mean
Calculate the mean of: 50, 13, 18, 24, 15, 8, 36. Give your answer to 2 decimal places
Answer: 23.43