Keystones — Lintel
Five GCSE retrieval questions · 11 September 2015 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 69,000,000 in standard form
Answer: 6.9 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 30
Answer: (x + 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 18cm, angle = 64°. Find adjacent side. Give your answer to 2 decimal places
Answer: 7.89cm -
4. Ratio Mixed ratio problems
Divide 99 in the ratio 4:3:2
Answer: 44, 33 and 22 -
5. Statistics Mean
Calculate the mean of: 37, 28, 17, 47, 33, 12, 31, 41
Answer: 30.75