Creating Random Questions And Answers Javascript

I have a question and answer section of my site, where the user is asked 6 questions of out 40 possible questions. There are set answers for each one, but there isn't a correct ans

Solution 1:

Step 1) Declare a questions table:

var questions = [1, 2, 3, 4, 5, ..., 40];

Step 2) Get the 1st random question

var random1 = Math.floor(Math.random() * questions.length) ;
var choice1 = questions[random1];

Step 3) Remove it from the table

questions.splice(random1, 1);

Repeat steps 2 & 3 to get more questions