Keystones — Lintel
Five GCSE retrieval questions · 14 February 2012 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 600,000,000 in standard form
Answer: 6 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² + 14x + 24
Answer: (x + 12)(x + 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 22cm, angle = 54°. Find opposite. Give your answer to 2 decimal places
Answer: 30.28cm -
4. Ratio Mixed ratio problems
Express the first part of 11:14 as a fraction in simplest form
Answer: 11⁄25 -
5. Statistics Mean
The mean of 5 numbers is 37. If 4 of them are 40, 47, 17, 21, what is the missing number?
Answer: 60