Brainfuck, 162 bytes

>+[+[>+<+<]>]+[,[>[>+<<->-]<[>>>+<<<-]>>>>+<<[<+>-]<<+>>]<<]>>>[-]>>[<+>-]<[->+>-[>+>>]>[+[-<+>]>+>>]<<<<<<]>[-]+++++++>[-]<[>+++++++<-]>>[<.[-]>[-]>[-]]<[-.[-]]

Try It Online!

outputs 0 for truthy and 1 for falsey

This one was a lot of fun. Not necessary golf-optimal but hey, brainfuck solution :)

brainfuck, 162 bytes

>+[+[>+<+<]>]+[,[>[>+<<->-]<[>>>+<<<-]>>>>+<<[<+>-]<<+>>]<<]>>>[-]>>[<+>-]<[->+>-[>+>>]>[+[-<+>]>+>>]<<<<<<]>[-]+++++++>[-]<[>+++++++<-]>>[<.[-]>[-]>[-]]<[-.[-]]

Try It Online!

outputs 0 for truthy and 1 for falsey

This one was a lot of fun. Not necessary golf-optimal but hey, brainfuck solution :)

Explanation

; 96 algorithm from esolangs constants
; initialise tape to (1)/96/0/0/0
>+[+[>+<+<]>]+[
    ; while(getchar())
    ,[>
        [>+<<->-]
        <[>>>+<<<-]>>>>+<<[<+>-]<<+>>
        ; 0/96/(0)/cumulative/length
    ]
    <<
]

; divmod algorithm from esolangs
>>>[-]>>[<+>-]
<[->+>-[>+>>]>[+[-<+>]>+>>]<<<<<<]

; prepare 0 for output
>[-]+++++++>[-]<[>+++++++<-]

; if(sum%length){print 1}else{print 0}
>>[<.[-]>[-]>[-]]<[-.[-]]