Keystones — Lintel
Five GCSE retrieval questions · 27 December 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 9,800,000 in standard form
Answer: 9.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 110
Answer: (x + 10)(x - 11) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 15cm, angle = 49°. Find opposite. Give your answer to 2 decimal places
Answer: 17.26cm -
4. Ratio Mixed ratio problems
£198.00 is shared between A and B in the ratio 5:4. How much does A receive?
Answer: £110.00 -
5. Statistics Mean
Calculate the mean of: 18, 40, 9, 48, 50, 30, 7. Give your answer to 2 decimal places
Answer: 28.86