alleryStart learning →Which number passes the alternating-sum test for 11?
A3,278
B3,279
C2,345
D6,123
Answer & Solution
Correct answer: A. 3,278
For 3,278 the alternating sum is 3-2+7-8 = 0, a multiple of 11; the others give -1, -2 and 4.
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