Quiz day 7 dubious answer

Hello,

The question for quiz day 7 was:

How many islands do you need to complete to get at least 1 Ninja?

 

The answer was given as 12, but I’m the only one who replied with 13.

You still aren’t sure of a ninja after island 12, there is still a ship before you get a ninja. The question was only about islands, so in order to be 100% sure, 13 islands need to be completed (13 doesn’t even have to be “completed” but that’s not the question).

How many islands do you need to complete to get at least 2 Ninja? 

And

How many islands do you need to complete to get at least 3 Ninja? 

 

24 and 29?  20 and 30? 

Does anyone know the answer?

 

 

 

This is irrelevant to my post, but here goes…

You get the 2nd ninja at mission 24, that means 20 islands
&
You get the 3rd ninja at mission 29, that means 24 islands.

 

Now please answer my question, knowing you get your 1st ninja by completing mission 15:

If you complete mission 14 (= 12 islands) and stop playing, do you have your first ninja?
if you complete mission 16 (= 13 islands) and stop playing, do you have your first ninja?