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MathNet 2013 Question 39

Math Olympiad Vault · MathNet 2013

Question 39

There exist unique nonnegative integers $A, B$ between $0$ and $9$, inclusive, such that
$$
(1001 \cdot A + 110 \cdot B)^2 = 57,108,249
$$
Find $10 \cdot A + B$.