SOLUTION: How many distinct nonzero integers can be represented as the difference of two numbers in the set {1,3,5,7,9,11,13} ?

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Question 980936: How many distinct nonzero integers can be represented as the difference of two numbers in the set {1,3,5,7,9,11,13} ?
Answer by MathLover1(20850) About Me  (Show Source):
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{ -12,-10,-8,-6,-4,-2,2,4,6,8,10,12 }
so, there are 12 distinct non-zero integers