\textbf{$$ABCD$$~}is a four digit number:  Its first digit is $$\dfrac{1}{4}$$ of its last digit  The second digit is $$1$$ less than its first digit  When you multiply $$ABCD$$ by $$4$$, its digits appear in reverse order  None of the digits are the same  What is the number? 
Overseas Competition->Knowledge Point->Number Theory Modules->Place Value and Number Bases->Numbers->Understanding Numbers and Digits