Folklore

 Winnie-the-Pooh has five friends, each of whom has pots of honey in their house: Tiger has 1, Piglet has 2, Owl has 3, Eeyore has 4, and Rabbit has 5. Winnie-the-Pooh visits each friend in turn, eats one pot of honey, and takes the rest with him. When he approached the last house, he was carrying 10 pots of honey. Whose house could Pooh have visited first?
After visiting all the dens, Winnie-the-Pooh should have $(1+2+3+4+5)-5=10$ pots. Since he already had 10 pots before the last visit, the last den he visited was Tigger's.

The other dens he could have visited in any order, as the value of the sum does not change with the order of the addends.

## Answer

Any, except Tigger's.