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1+4=5 2+5=12 3+6=21 8+11=?
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1+4=5
2+5=12
3+6=21
8+11=?

User Jbranchaud
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4 votes
1+4=5 5+5+2=12 12+6+3=21 21+8+11=40
User Michael Borgwardt
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