Brain Teasers
The Same Number
Bill and Bob were trying to see whose arm was longer. So, what they first did was put each other's arm side to side and saw that they both looked similar in size.
Next, they measured the length of their arm from the shoulder to the tip of the finger and divided that by the length from their elbow to the tip of the finger. They both got the same number, but when they just took the shoulder measuring, Bill's arm was longer. How can this be?
Next, they measured the length of their arm from the shoulder to the tip of the finger and divided that by the length from their elbow to the tip of the finger. They both got the same number, but when they just took the shoulder measuring, Bill's arm was longer. How can this be?
Answer
Phi. On any part of the body, such as the arm, phi, or 1.61803399, will always be the outcome. The length of the entire arm divided by the length just from the elbow will always equal that, just like the finger and the leg, and the body. It is also true on animals and even plants.Hide Answer Show Answer
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