Use your logical skills to solve this riddle.
Sam and Jack were arrested and locked in an isolated dungeon.
They plan to escape, but the only window is 20 feet high.
So they plan to dig their way out.
After days of digging, they finally escaped in a simpler way and not through the hole in the ground.
How did they escape?
Answer: As the dug out all the sand they realized that, if they would accumulated the sand high enough they would be able to reach the window.
So they simply kept digging till they were able to get to enough height so that they could climb to the window.