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Basically, what I want is exactly asked in Showing Solutions of the Questions "separately", except that I'm using amsbook. So, I want to write a series of questions, by writing something like


\question 1+1=?


\question What is 1+2=?



The code above should display the questions only:

Question 1: 1+1=?

Question 2: 1+2=?

Then the command


displays the answers:

Answer 1: 1+1=2

Answer 2: 1+2=3

I also want the enumeration style "Question 1, Question 2, ..." to be customizable.

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I think this might help. tex.stackexchange.com/questions/60771/… – R. Schumacher Jul 9 '12 at 14:31
I don't seem to find the answer to my question. – greg Jul 9 '12 at 14:36
Another option, use the exercise.sty style file. It will give you both an exercise and and answer environment. You have the options of either one, both, or none. I use this to put questions into beamer presentations with or without answers. – R. Schumacher Jul 9 '12 at 14:40

Here's a solution using the answers package.

You can toggle the answers appearing or not by using


to write the answers to a file (answers.tex in the code below) or


to show the answers in the document.

I've used the enumitem package to create a list-type environment called questions, and defined the \question command as \item (although it doesn't take an optional argument- not sure if this matters or not here though).


\usepackage{enumitem}   % for custom lists
\usepackage{answers}    % for separating solutions

\setlist[questions]{label*=Question \arabic*.}

% open the answer file


\question $1+1=?$

\question What is $1+2=?$

% close the answer file

% use this line if you'd like to include the answers separately
\IfFileExists{answers.tex}{\input{answers.tex}}{no file!}

You can do a lot with the answers package, particularly if you combine it with the hyperref, as shown in a few answers on this site, for example in Adding another answer hyperlinked to the question itself

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