well, it could be + or - of any of the following:
1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, or 140 itself.
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It is: 35
140
4 because 35+35=70+35=105+35=140
The positive, whole-number factors of 140 are: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, and 140.
Well, honey, 99 goes into 140 just one time, with a remainder of 41. So, you can say 99 goes into 140 once, but it doesn't fit perfectly so you have a little leftover. Math can be a real diva sometimes, can't it?