Keystones — Lintel
Five GCSE retrieval questions · 5 September 2022 · mathsvault.uk/keystones
-
1. Number Converting to standard form
930000
Answer: 9.3 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 7x + 10
Answer: (x - 5)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 26cm, angle = 58°. Find opposite
Answer: 41.6cm -
4. Ratio Mixed ratio problems
In ratio 2:1:4, what fraction is the second part?
Answer: 1⁄7 -
5. Statistics Mean
The mean of 5 numbers is 28. If 4 of them are 32, 19, 46, 19, what is the missing number?
Answer: 24