Tregor, Parbatya and Prakashji All are correct! 'BUT' I appreciate 1x2 + 3x6 = 4x5 (Parbatya) answer. The reason behind there's a uniformity in his solution. The operation he uses is very readable. 'Again' it's upto you!!! Another example could be - (5/6) + (1/2) = (4/3) LHS = {(5+3)/6} =8/6 =4/3 Thus RHS!!! Thanks for brainstroming and your commendable effort!!!