Keystones — Lintel
Five GCSE retrieval questions · 29 June 2021 · mathsvault.uk/keystones
-
1. Number Converting to standard form
52000000
Answer: 5.2 × 107 -
2. Algebra Factorising monic quadratics
Factorise: x² - 12x + 35
Answer: (x - 5)(x - 7) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 18cm, angle = 54°. Find opposite
Answer: 24.8cm -
4. Ratio Mixed ratio problems
Simplify: 9:18:9
Answer: 1:2:1 -
5. Statistics Mean
The mean of 6 numbers is 21. If 5 of them are 32, 33, 21, 33, 37, what is the missing number?
Answer: -30