Problem 375 (difficulty: 9/10)

Lehet-e a számegyenes minden racionális pontja fölé egy \(\displaystyle T\) betűt írni? És minden pontja fölé?

Give me another random problem!

Subject, section:
Requested difficulty:
Request for a concrete problem:I want problem no.

Supported by the Higher Education Restructuring Fund allocated to ELTE by the Hungarian Government