A problem by Anthony Ma-at
Level
pending
1+1=0 2+2=0 3+3=0 4+4=0 5+5=0 6+6=2 7+7=0 8+8=4 9+9=2 10+10=?
2
20
0
6
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1 solution
just find how many circles in each number! 1=0, 2=0, 3=0, 4=0, 5=0, 6=1, 7=0, 8=2, 9=1, 10=1 6 has one circle 8 has to circles 9 has one circle 10 has 1 circles so 10+10 = 2