Keystones — Lintel
Five GCSE retrieval questions · 13 November 2016 · 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 - 2x - 8
Answer: (x + 2)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 26cm, angle = 42°. Find adjacent side. Give your answer to 2 decimal places
Answer: 19.32cm -
4. Ratio Mixed ratio problems
In ratio 2:6:1, what fraction is the second part?
Answer: 2⁄3 -
5. Statistics Mean
The mean of 6 numbers is 35. If 5 of them are 24, 48, 44, 19, 50, what is the missing number?
Answer: 25