Math Olympiad Class 23 Sep 2016 at GovindMaths Kajang

Math Olympiad at GovindMaths Kajang 23-Sep-2016

Question

Let n be a four digit integer whose digits are all distinct. If 9n equals the integer obtained by reversing the digits of n, compute n.

(Solution in picture)

*Classes are on Fridays (8 pm to 10 pm)