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If 2 + 4 = 12, 4 + 6 = 30, 5 + 2 = 12, 6 + 3 = 21 then 1 + 9 = ?

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If 2 + 4 = 12, 4 + 6 = 30, 5 + 2 = 12, 6 + 3 = 21 then 1 + 9 = ?
posted Aug 8 by Puneet Batra

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1 Answer

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18


a+b=ab + b
1+9 = 1*9+9= 18

answer Aug 13 by Hanifa Mammadov
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