Keystones — Lintel
Five GCSE retrieval questions · 1 September 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 590,000 in standard form
Answer: 5.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 11x + 28
Answer: (x - 4)(x - 7) -
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
Black and white counters are in the ratio 12:13. What fraction of the counters are black?
Answer: 12⁄25 -
5. Statistics Mean
The mean of 4 numbers is 35. If 3 of them are 30, 33, 36, what is the missing number?
Answer: 41