Odd and Even back in Delhi

Hi, I don’t understand the question here, the questions says something and the sample test given there relates to something else differently. The question asked is that “if sum of the digits is even and divisible by 4 then print 'YES”".But in the explanation you are only adding odd digits of the number and check whether that is even or odd and then divide it by 4 if its even else divide it by 3. Why the question and explantion is so different from each other ?