Keystones — Lintel
Five GCSE retrieval questions · 15 December 2017 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 8,600,000 in standard form
Answer: 8.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 24
Answer: (x + 6)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.61cm -
4. Ratio Mixed ratio problems
In ratio 11:9:3, what fraction is the first part?
Answer: 11⁄23 -
5. Statistics Mean
The mean of 5 numbers is 29. If 4 of them are 37, 15, 40, 48, what is the missing number?
Answer: 5