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How many edges does a Möbius strip have?

one

two

three

four

The Möbius strip is a surface with only one side and only one boundary component (edge). A line drawn starting from the seam down the middle will meet back at the seam but at the "other side". If continued the line will meet the starting point and will be double the length of the original strip.

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Which direction is not possible to point at when standing at the South Pole?

neither east, west, nor south

What is the maximum distance a plane can fly travelling constantly North?

It can fly endlessly (as long it can)

If Earth's radius was larger by 1 meter, how much longer would its equator be?

by approx 6 meters

by approx 6 kilometers

by approx 60 kilometers

by approx 6000 kilometers

How many edges does a cube have?