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If 1+4=5, 3+5=12, and 3+6=21 then 5+8=?

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If 1+4=5, 3+5=12, and 3+6=21 then 5+8=?
posted Aug 23, 2018 by anonymous

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1 Answer

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44


Add up the previous sum to current one:
1+4=5
5+2+5=12 (here must be typo, should be 2 instead of 3)
12+3+6=21
21+5+8=44

answer Oct 17, 2018 by Hanifa Mammadov
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