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Anonymous
These: 1 x 81, 3 x 27, 9 x 9
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9 x 9 = 81 :(
1 x 81, 3 x 27, 9 x 9.
245
-9 and -9 multiply to get 81. ■
The numbers that add to get 6 and multiply to get 81 are 3 and 3.