Join href to a button

You can use a JQuery (or Javascript) to make default link opening with href on button

    $("button").click(function() {

      if ($(this).attr("href")) {
        alert('Irá redirecionar para ' + $(this).attr("href"));
        window.location.href = $(this).attr("href");
      }

    });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script><buttonhref="chk-gerente.php?nro_pergunta=1" type="submit" class="btn btn-default">REPONDER</button>

However for your specific case you can create a input hidden and then redirect the person.

For example:

HTML:

<form action="" method="get">
<input type="hidden" name="proxima" value="<?= $nro_pergunta ?>" />
<button type="submit"  class="btn btn-default" >REPONDER</button>
</form>

PHP:

<?php

if(isset($_GET['proxima'])){

//...

$pergunta = (int)$_GET['proxima'];
// Número da pergunta (se não for número remove o (int)!)

header('location: chk-gerente.php?nro_pergunta='.$pergunta);
// Redireciona    
}

?>

In this way, you will get nro_pergunta of hidden and will redirect to the chosen URL.

You have to put the link inside the button, try to put it like this:

<button type="button"><a href="URL.php">responder</a></button>

Thank you guys for the tips, I tested them and gave them right, but the one that was exactly what I needed was the @hgfdgd:

when you have a button, embed it in a form: <form action=YOUR_URL method=get> <input type=hidden name=nro_pergunta value=<?php echo $nro_pergunta; ?> <button...> </form> see also:

Thank you very much everyone.  Strong hug.