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The entries of row 8 are added and subtracted alternately, starting with plus. What is the result?
A1
B2
C0
D8
Answer & Solution
Correct answer: C. 0
For any row after the first, 1 - 8 + 28 - 56 + 70 - 56 + 28 - 8 + 1 cancels to zero.
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