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535
Corene Breitenberg ∙
The factor pairs of 525 are (525,1)(175,3)(105,5)(75,7)(35,15)(25,21)
None of them add up to ten.
-10 and 1
-10
6
8 and 2
-5 and -10
10 and -9
-12
10
3
-18 and -10
-10 and -4