Correct: 1+1=2, 2+2=4, 3+3=6, 4+4=8, 5+5=10, 6+6=12, 7+7=14, 8+8=16, 9+9=18, 10+10=20, Incorrect: 1+1=3, 2+2=9, 3+3=5, 4+4=11, 5+5=8, 6+6=6, 7+7=13, 8+8=91, 9+9=21, 10+10=11,

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