Check Out This Tricky Problem From A 1985 IQ Test

If you are standing directly on the North Pole and you walk 1 mile south, 1 mile west, and 1 mile north, you will arrive back at the North Pole. Now imagine a circle with a 1-mile circumference that has the South Pole at its center. If you were to start 1 mile north of this circle, you would travel 1 mile south, 1 mile west all the way around the circle, and then 1 mile north back to your starting point. So you could start anywhere that is 1 mile north of the circle around the South Pole. Now, imagine that the circle around the South Pole has a circumference of 1/2-mile. If you were to start 1 mile north of that circle, you would travel 1 mile south, 1 mile west around the circle twice, and then 1 mile north back to your starting position. If the circle were 1/3-mile, you could still start 1 mile north of it, and you would travel around the circle 3 times...

The same is true for any fraction 1/n, and the result is that you walk around the circle n times.

If you are standing directly on the North Pole and you walk 1 mile south, 1 mile west, and 1 mile north, you will arrive back at the North Pole. Now imagine a circle with a 1-mile circumference that has the South Pole at its center. If you were to start 1 mile north of this circle, you would travel 1 mile south, 1 mile west all the way around the circle, and then 1 mile north back to your starting point. So you could start anywhere that is 1 mile north of the circle around the South Pole. Now, imagine that the circle around the South Pole has a circumference of 1/2-mile. If you were to start 1 mile north of that circle, you would travel 1 mile south, 1 mile west around the circle twice, and then 1 mile north back to your starting position. If the circle were 1/3-mile, you could still start 1 mile north of it, and you would travel around the circle 3 times...

The same is true for any fraction 1/n, and the result is that you walk around the circle n times.