user-1: If, in Bitcoin, the nonce is included in the header of the proposed block, is it the answer to the puzzle from the previous block? 

user38618: Nonce of a header is the answer to that block.
Recall the mining process:

Create a template block header
Choose a nonce
Hash the block header
If the hash is lower than network difficulty, broadcast it. Else, choose a different nonce.

To sum up, nonces are for individual blocks, and a different nonce is chosen until the template becomes a valid block.

-1: <p>If, in Bitcoin, the nonce is included in the header of the proposed block, is it the answer to the puzzle from the previous block? </p>
 38618: <p>Nonce of a header is the answer to <strong>that block.</strong></p>

<p>Recall the mining process:</p>

<ul>
<li>Create a template block header</li>
<li>Choose a nonce</li>
<li>Hash the block header</li>
<li>If the hash is lower than network difficulty, broadcast it. Else, choose a different nonce.</li>
</ul>

<p>To sum up, nonces are for individual blocks, and a different nonce is chosen until the template becomes a valid block.</p>
