IEEE Weekly Puzzle

31 March 2014 Comments Off on IEEE Weekly Puzzle

#18 – Four-Digit Number

We have a four-digit number, each of whose **************** digits is a different number. The number itself (ABCD) and its reversed version (DCBA) are divisible by the sum of its digits. What is the largest number that satisfies these conditions?

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This question was prepared by Emrehan Hal?c?, president of the Turkey Intelligence Foundation, for Bilkent IEEE.