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Junior Mathematical Olympiad, September 2019

Netherlands 2019 algebra

Problem

In the puzzle below, , and are nonzero digits such that the two calculations are correct. The digits need not be distinct. How many solutions are there for which ?



A) 1 B) 2 C) 3 D) 4 E) 5
Solution
B) 2
Final answer
B

Techniques

Integers