Question 1183495
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The other tutor is correct, in that we can never know the answer to a question like this.<br>
Spend a little time (or a lot, if you want) looking for pattern(s) in the given numbers that suggest what the answer MIGHT be.<br>
One thing you can do if you don't see any pattern with the given numbers is to split it into two "spliced" sequences.  In this example, that gives you something that allows you to GUESS what the answer is.<br><pre>
Given:

5,13,11,16,16,20,20,25,23,_,_

Split it into...

5,   11,   16,   20,   23,   ,___
  13,   16,   20,   25,   ___</pre>
I'll let you see what you can do with that....<br>