Reading numbers from console until input isn't a number I want to read N numbers (Nmax = 100) from console into a list. N is not known, but the first input that is not a number may break the reading process... However the solution should be as simple as possible, so I just read 100 lines:

let numbers = [1..100]
        |&gt; List.map (fun x -&gt; Int32.TryParse(Console.ReadLine())) 
        |&gt; List.filter (fun (isNum, num) -&gt; isNum)
        |&gt; List.map (fun (isNum, num) -&gt; num)


Is there a simpler (less code) solution?
Your code does not read numbers from the "console until input isn't a number", but reads 100 inputs strings from the console and returns those that can be converted to integers.

If you want to read numbers from the console "until input isn't a number", you could do something like this:

let numbers1 max = seq {for x in 1..max do yield Int32.TryParse(Console.ReadLine()) }
                  |&gt; Seq.takeWhile (fun (b, x) -&gt; b) 
                  |&gt; Seq.map (fun (b, x) -&gt; x)


or 

let numbers2 max = seq {for x in 1..max do yield Int32.TryParse(Console.ReadLine()) }
                    |&gt; Seq.takeWhile (fun (b, x) -&gt; b) 
                    |&gt; Seq.map (fun (b, x) -&gt; x)
                    |&gt; Seq.toList


if you want to defer the return of each input to after the last valid input has been entered.