Number puzzle - Math Riddle

    35

    Explanation :  

    The value of RHS is
    (A*A)   (A+A)
    i.e(2*2)   (2+2) = 4   4 = 00
    (3*3)   (3+3) = 9   6 = 03
    (4*4)   (4+4) = 16   8 = 08
    (5*5)   (5+5) = 25   10 = 15
    (6*6)   (6+6) = 36   12 = 24
    (7*7)   (7+7) = 49   14 = 35