When the square of an eight-digit integer is subtracted from the square of a different eight- digit integer, the difference will sometimes have eight identical even digits. What are both possible values of the repeated digit in such a situation?
A.
2,4
B.
6,8
C.
4,8
D.
2,6
Exam No：2018 First Round Grades 10-12 Year：2018 Question No：14
Answer:
C
Knowledge points:
G10-12 - Number Theory - Difference of Squares (Application)
Solution:
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