Keystones — Lintel
Five GCSE retrieval questions · 15 August 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 0.0067 in standard form
Answer: 6.7 × 10-3 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 6
Answer: (x + 3)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 29cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 18.12cm -
4. Ratio Mixed ratio problems
Express the second part of 6:7 as a fraction in simplest form
Answer: 7⁄13 -
5. Statistics Mean
The mean of 6 numbers is 37. If 5 of them are 43, 20, 15, 49, 29, what is the missing number?
Answer: 66