Keystones — Lintel
Five GCSE retrieval questions · 14 June 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 290,000 in standard form
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 4x - 45
Answer: (x + 5)(x - 9) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 24cm, angle = 28°. Find adjacent side. Give your answer to 2 decimal places
Answer: 21.19cm -
4. Ratio Mixed ratio problems
£288.00 is shared between A and B in the ratio 5:3. How much does A receive?
Answer: £180.00 -
5. Statistics Mean
Calculate the mean of: 50, 13, 14, 50, 20, 24, 44. Give your answer to 2 decimal places
Answer: 30.71