Keystones — Lintel
Five GCSE retrieval questions · 22 January 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0005 in standard form
Answer: 5 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 72
Answer: (x + 9)(x - 8) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 50°. Find opposite. Give your answer to 2 decimal places
Answer: 17.88cm -
4. Ratio Mixed ratio problems
£252.00 is shared between A and B in the ratio 1:2. How much does A receive?
Answer: £84.00 -
5. Statistics Mean
Calculate the mean of: 26, 32, 42, 42, 27, 45. Give your answer to 2 decimal places
Answer: 35.67