0
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1 and 11
11
21
-145
1 x 77, 7 x 11
They are: 3 times 11 = 33
11 and 11
-11
2 and 11
7 x 11
11x5
Among the real whole numbers, you only have two choices: -1 x 11 and 1 x -11
51
-31
121 ×1
221
13