Here is a modified version of Bonanova's puzzle How Many Tickets?
Suppose n tickets numbered 1-n are in a box, and you draw five of them without putting them back in the box.
Your tickets have numbers p1, p2, p3, p4 and p5 on them.
You don't know how many tickets are in the box, but you are asked to estimate how many there are.
What estimate of n has the highest likelihood of being correct?