Keystones — Lintel
Five GCSE retrieval questions · 3 January 2011 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 200,000,000 in standard form
Answer: 2 × 108 -
2. Algebra Factorising monic quadratics
Factorise: x² - x - 30
Answer: (x + 5)(x - 6) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 19cm, angle = 32°. Find opposite. Give your answer to 2 decimal places
Answer: 11.87cm -
4. Ratio Mixed ratio problems
Divide 252 in the ratio 4:4:1
Answer: 112, 112 and 28 -
5. Statistics Mean
The mean of 4 numbers is 29. If 3 of them are 24, 29, 49, what is the missing number?
Answer: 14