1+10
2+9
3+8
4+7
5+6
And vice versa of all these math problems.
12-1
13-2
14-3
15-4
to be continued.............
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No, it equals 9, but XI equals 11.
The number that equals 121 when squared is 11.
X=5Y= 92x + 11= ?2(5)+11=?10+11= 21
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