Problem K. 468. (September 2015)
K. 468. \(\displaystyle x\) denotes a positive integer such that the fraction \(\displaystyle \frac{30−x}{91}\) can be rationalized. Find all possible values of the fraction, expressed in lowest terms.
(6 pont)
Deadline expired on 12 October 2015.
Statistics:
140 students sent a solution.  
6 points:  60 students. 
5 points:  31 students. 
4 points:  19 students. 
3 points:  15 students. 
2 points:  9 students. 
1 point:  3 students. 
0 point:  3 students. 
