At a glance
5
Occurrences
questions
3
Years
4
Papers
5
Worked
100%
When this method shows up
Years in which at least one question on this paper triggers the method.
Other top methods in Proof & Number Theory
- In "show that ... hence ...", the first part is the tool you must reuse×7
- No nontrivial solution / irrationality by descent or counting prime powers×5
- Rearrange into a product equal to a fixed constant, then exhaust factor pairs×4
- Constrain integer solutions by reducing modulo a well-chosen base×3
- Repeated factor means a shared root of and ; remainder theorem to interpolate×2
See the worked examples
Open this method in the 3-panel methods app to see the demonstration, every linked past-paper question, and how to attack it.
Open method in the STEP appTry a method on a real paper
Open the STEP methods app to see worked examples, linked questions and the 3-panel revision view.
Open STEP methods