The difference between a text without problems and a text with problems is like the difference between learning to read a language and learning to speak it.
Disturbing the Universe
Loci: Convergence
Tree and Vine
A tree is 20 feet tall and has a circumference of 3 feet. There is a vine that winds seven equally spaced times around the tree and reaches the top. What is the length of the vine? (China 100 BCE)
Click here to reveal the answerThe answer is: 29 feet
