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IMSO 2025 Mathematics — International Short Answer Question 14

IMSO Maths · IMSO 2025 Mathematics — International Short Answer

Question 14

The three-digit number $\overline{abc}$ is reversed to form a new three-digit number $\overline{cba}$ where a, b and c are not necessarily distinct. We know that the original number plus the result of forty-five times the sum of its digits is equal to the new number. How many different numbers of $\overline{abc}$ satisfy the conditions?