Maybe this one can tell us what happened to the missing dollar:
Add elephants to the growing menagerie of animals that can count.
An Asian elephant named Ashya beat this reporter at a devilishly simple addition problem. When a trainer dropped three apples into one bucket and one apple into a second, then four more apples in the first and five more in the second, the pachyderm recognised that three plus four is greater than one plus five, and snacked on the seven apples. (In my defence, I watched the video in a noisy and crowded auditorium.)