sum ABCD +BCDA+CDAB+DABC, when each number has least prime divisor 11
Source: Mathematics Regional Olympiad of Mexico West 2018 P4
September 8, 2022
number theory
Problem Statement
The letters and each represent a different digit, so each of the four-digit numbers , , and satisfy that its least prime divisor is equal to . Determine all possible values of the sum
and for each possible value of said sum, give an example of a choice of digits and with which to obtain that value and which satisfies the conditions established above.