2.Two people are thrown in a prison together and they share a tall cell with a dirt floor and a high window. The only thing apart from them in the room is a shovel.
They tried really hard to reach to the window but they decide it is better to dig a tunnel to the outside one by one using the shovel. Although they know it is time consuming and it could take weeks. So after digging for some days they came up with a plan that is faster.
So do you think you know the answer?
Answer is simple. They used the dirt from the hole to build a small mountain. High enough to reach to the window.