Evolution of Powers of Two

Answer 17: 05AB1E, Distance of 3

#"Ａ#327;N<."$"/class HelloWorld {static void Main() 0{;n***~
#    System<.Console<.<.
#1024p#rint(512);
#0}}//4|
#β”6904”±r«"$2 
puts 16384 8*

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Answer 24: Bash, distance 8

#23#2ej
printf $[2**24]
#'$/*#"A#327;N<."$"/class HelloWorld {static void Main() 0{;n***~
#    System<.Console<.<.
#1024p#rint(512);
#0}}//4|
#ß”6904”±r«"$2 
#puts 16384 8*di 2^18o8*'

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Answer 51, Haskell, distance 10

--2@2(#"#28@P2*Jp;math 2\^45#2^41 NB.`(expt 2 39); ^ exit @n.out (*2 32#e#a44******O@)//2 25)#e#2ej#printf("% $[2**43]bye'$/*#"A#327;N<."$"/class HelloWorld {static void Main() 0{;n***~#    System<.Console<.<.#1024
print(2^51)--;#0}}//4|#6904r"$2 #puts 16384 8*di 2^18o8*'*[[[268*^?>

Remove 2 NL, replace ^ at the beginning with -, prepend another -, delete * within the print, replace 2nd * with ^, overwrite 49with 51, insert -- after the print.