Answer Posted / ramkumar

2+3=8 (2*3)+2*(1)
3+7=27 (3*7)+2*(3)
4+5=32 (4*5)+2*(6)
5+8=60 (5*8)+2*(10)
6+7=72 (6*7)+2*(15)
7+8=(98) (7*8)+2*(21)

here the logic is in the difference between the numbers
1,3,6,10,15,21
difference is
in between 1 and 3 there is 1 number
in between 3 and 6 there are 2 numbers
in between 6 and 10 there are 3 numbers
in between 10 and 15 there are 4 numbers
in between 15 and 21 there are 5 numbers


***6+7=72 (its 72 not 60)

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