True: 1+1=2, 3+3=6, 5+5=10, 4+4=8, 2+2=4, 1+2=3, 2+3=5, 3+4=7, 4+5=9, 5+6=11, 2+1=3, 3+2=5, 4+3=7, 5+4=9, 6+5=11, 10+10=20, 2=1+1, 4=2+2, 6=3+3, 8=4+4, 10=5+5, 3=2+1, 5=2+3, 7=3+4, 9=5+4, 11=6+5, 11=5+6, 3=2+1, 7=4+3, 9=4+5, False: 1+1=3, 3+3=5, 2+2=5, 5+5=11, 4+4=6, 2+2=3, 1+2=4, 5+4=7, 7=4+4, 9=4+4, 5=1+3, 3+2=6, 9=5+5, 10=5+6, 5+6=10, 3+4=9, 9=5+3, 10=4+5, 6=3+2, 4+4=9, 3+3=7, 4+5=8, 8=4+3, 7=5+4, 4+4=9, 1+2=4, 3+4=5, 5+6=7, 1+1=3, 3=2+2,

doubles and near doubles to 5

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