Keystones — Lintel
Five GCSE retrieval questions · 14 September 2010 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 8,800,000 in standard form
Answer: 8.8 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 6x - 40
Answer: (x + 4)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 13cm, angle = 37°. Find opposite. Give your answer to 2 decimal places
Answer: 9.8cm -
4. Ratio Mixed ratio problems
Divide 216 in the ratio 3:2:3
Answer: 81, 54 and 81 -
5. Statistics Mean
The mean of 4 numbers is 24. If 3 of them are 33, 37, 17, what is the missing number?
Answer: 9