Math Olympiad Contest Problems for Elementary and Middle Schools: #31 [HD]

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Published on November 3, 2016 10:14:00 PM ● Video Link: https://www.youtube.com/watch?v=5JOaFu48SDE

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A palimage of counting number is the number that has the same digits as the given number but in reverse order. For example, 825 and 528 are palimages; so are 2,901 and 1,092. Now add 219 and its palimage. Call this sum X. Add X and its palimage. Call this sum Y. Add Y and its palimage. Call this sum Z. What is the value of Z?

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