Only For Geniuses

12107073_1189615381067512_5194320173722339425_n

Solution:  3*2 = 6+2 -1 = 7
5*4 = 20+4 -1 = 23
7*6 = 42+6 -1 = 47
9*8 = 72+8 -1 = 79
10*9 = 90+9 -1 = 98

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