SQLite rawQuery Select columns whose titles are real numbers

I have a table whose columns have numbers:

Table name "Valores"

id Nombre 11 18 12.3

01 Juan 10 08 15

02 Rosa 23 51 61

03 Pepe 35 18 11

I want to know the amount you have chosen any name in the column. Example to Rosa in the column 12.3 is 61. I made the following statements:

columna = (EditText) findViewById(R.id.eT_columna);
valor = (EditText) findViewById(R.id.eT_valor);
String stColumna = columna.getText().toString();

    public void consulta (View v){

       //Determinación del valor
        Cursor fila_valores = bd_valores.rawQuery(
                "select "+ stColumna + " from Valores where Nombre", null);
        if (fila_valores.moveToFirst()) {
            valor.setText(fila_valores.getString(0));
        }
        bd_valores.close();
    }

to run the application I get as a result 12.3 (correct value 61). What is my mistake ?. Thank You (sorry for my English)