Keystones — Lintel
Five GCSE retrieval questions · 30 April 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 550,000 in standard form
Answer: 5.5 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² + 7x - 18
Answer: (x + 9)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 43°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.63cm -
4. Ratio Mixed ratio problems
Divide 252 in the ratio 4:2:3
Answer: 112, 56 and 84 -
5. Statistics Mean
Calculate the mean of: 30, 14, 26, 5, 41, 50, 39. Give your answer to 2 decimal places
Answer: 29.29