A kangaroo kept getting out of his enclosure at the zoo.
Knowing that he could hop very high, the zoo officials put up a ten-foot fence.

He was out the next morning, just wandering around the zoo.
A twenty-foot fence was put up. Again he go out.

When the fence was forty feet high, a camel in the next enclosure asked the kangaroo, “How high do you think they’ll go?”

The kangaroo said, “Pretty high, unless somebody figures out to lock the gate at night!” Thanks to amusingfacts.com

Sometimes the answers for the tough questions and weird puzzles are very simple 🙂