What is the greatest integer that always divides the difference of the squares of any two different positive odd integers?
A.
（A） 2
B.
（B） 4
C.
（C） 6
D.
（D）none of above
Exam No：2020-2021 Math League First Round Grades 8-9 Year：2021 Question No：29
Answer:
D
Knowledge points:
G8-9 - Number Theory - Parity (Odd/Even Reasoning)
Solution:
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