#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?
The Prize for This Question: Rubik’s Race
Send your answer to ieee@bilkent.edu.tr by 5:30 p.m. on April 8, or visit ieee.bilkent.edu.tr/zeka to submit your answer online, and get a chance to win the prize!
This question was prepared by Emrehan Hal?c?, president of the Turkey Intelligence Foundation, for Bilkent IEEE.