27 Jun 2014

IrMO 2002 P2 Q2: Upper Secondary Mathematics Competition Question

Suppose n is a product of four distinct primes a, b, c, d such that

(a) a + c = d;

(b) a(a + b + c + d) = c(d - b);

(c) 1 + bc + d = bd.

Determine n.

[IrMO 2002, Paper 2, Question 2]




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