Keystones — Lintel
Five GCSE retrieval questions · 17 October 2013 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.09 in standard form
Answer: 9 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 32
Answer: (x + 8)(x - 4) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 19cm, angle = 61°. Find adjacent side. Give your answer to 2 decimal places
Answer: 9.21cm -
4. Ratio Mixed ratio problems
Simplify: 10:12:8
Answer: 5:6:4 -
5. Statistics Mean
The mean of 4 numbers is 39. If 3 of them are 18, 27, 44, what is the missing number?
Answer: 67