1.

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

Answer»

98

2+3=2*[3+(2-1)]=83+7=3*[7+(3-1)]=274+5=4*[5+(4-1)]=325+8=5*[8+(5-1)]=606+7=6*[7+(6-1)]=72therefore7+8=7*[8+(7-1)]=98x+y=x[y+(x-1)]=x^2+xy-x



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