Question about Vivendi Excel@ Mathematics Study Skills (71101) for PC, Mac

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2+3=8 3+7=27 4+5=32 5+8=60 6+7=72 then 7+8 =?

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The answer is 98:
2 + 3 = 2 * ( 2 + 3 ) - 2 = 8
3 + 7 = 3 * ( 3 + 7 ) - 3 = 27
4 + 5 = 4 * ( 4 + 5 ) - 4 = 32
5 + 8 = 5 * ( 5 + 8 ) - 5 = 60
6 + 7 = 6 * ( 6 + 7 ) - 6 = 72
7 + 8 = 7 * ( 7 + 8 ) - 7 = 98

Posted on Mar 11, 2011

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2*3+1=8
3*7+2=27
4*5+3=32
5*8+4=60
6*7+5=72
7*8+6=98

Posted on Aug 11, 2012

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