Max of the reversed of two numbers
Wren, 126 124 bytes

As always Wren is the longest. I hate Wren's verbosity.

Fn.new{|a|a.map{|i|i&gt;0?"":"-"+(i.abs.toString[-1..-(i.abs.toString.count)])}.map{|i|Num.fromString(i)}.reduce{|x,y|x&lt;y?x:y}}


Try it online!

Explanation

Fn.new{                                                                                                              // new anonymous function
       |a|                                                                                                           // with the parameter a
          a.map{|i|                                                                                                  // for each item in this parameter
                                  (i&gt;0)?"":"-"                                                                       // The sign of each item. If the item is larger than 0, return the null string, otherwise return a negative sign.
                                              +(                                           )                         // Append this with the following string:
                                                i.abs                                                                // The absolute value of i
                                                     .toString                                                       // Convert this value to a string
                                                              [-1..-(i.abs.toString.count)]                          // Reverse this string
                   Num.fromString(                                                          )                        // convert this to a number from a string
                                                                                             }.reduce{|x,y|x&lt;y?x:y}} // Find the minimum value of the list