Firstly, remember that there are TWO prizes, so anybody can win the random prize!
Suppose n is a product of four distinct primes a, b, c, d such that
(i) a(a + b + c + d) = c(d - b);
(ii) 1 + bc + d = bd;
(iii) a + c = d.
Determine n.
Earnings from each Brainsteem Puzzle will go towards the next Prizes.
For this Brainsteem # 7 the Prizes are:
2 SBD for the first correct answer that includes a valid method
1 SBD for one other correct answer that will be chosen randomly. That means you can still win this prize even if the answer may already be visible!
Please upvote! Resteem if you think this is a great puzzle! I will upvote all correct answers and any other interesting comments. To be fair to everyone, the prize closes after 7 days. Winners will be notified after that date and usernames posted with a solution.
Enjoy!
@rycharde for more Brainsteem Prizes!