stinker2 stinker2
  • 28-02-2016
  • Mathematics
contestada

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

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mnm5 mnm5
  • 28-02-2016
the answer is 40 because once you have 21 your just adding 19 and then that makes it 40.
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