Mathematical and Physical Journal
for High Schools
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Problem K. 467. (September 2015)

K. 467. Let \(\displaystyle p\) denote a prime number greater than 3 and less than 1000. What are the chances that \(\displaystyle p−1\) or \(\displaystyle p+1\) is divisible by 6?

(6 pont)

Deadline expired on October 12, 2015.


142 students sent a solution.
6 points:78 students.
5 points:22 students.
4 points:4 students.
3 points:4 students.
2 points:6 students.
1 point:17 students.
0 point:11 students.

Problems in Mathematics of KöMaL, September 2015