If c>a; show that cba−abc=99(c−a).
Given : c>aTo show: cba−abc=99(c−a)Proof:cba=100c+10b+a ...(i)(By using property 3)abc=100a+10b+c ...(ii)(By using property 3)Subtracting (ii) from (i)cba−abc=100c+10b+a−100a−10b−c⇒ cba−abc=99c−99a⇒ cba−abc=99(c−a)Hence Proved.