Challenge or quiz question

Question

What is the output of this code?
arr = [1, 6, 4, 2]
print arr.take(arr.last)
answer is [1, 6]

I don't get it. Last should't it be 2?
There are plenty of challenge questions I don't understand. Not sure if I should be posting new questions for all challenge explanations or just use one new question thread?

Answer 1

Thank you John Wells. I will post future questions related to such topics here. I just posted another one before I saw this.

Answer 2

arr.last returns 2 and arr.take(2) yields the first two elements. It makes sense to continue using this thread.