What is the approximate value of the golden ratio ("phi")?

3.14

2.16

1.61

0.87

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. It is often used for aesthetics in art and design.

Ninjai

Wallpoper wikipedia → Golden ratio

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the Netherlands

26%

68%

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67%

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54%

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21%

50%

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25%

47%

8839

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36%

13%

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165

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148

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33%

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40%

32%

28%

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23%

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57%

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21%

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

east

west

north

neither east, west, nor south

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

10,002 km

20,004 km

40,007 km

It can fly endlessly (as long it can)

How many edges does a Möbius strip have?

Which quadric surface is shaped like a saddle?

parabolic cylinder

elliptic paraboloid

hyperbolic paraboloid

elliptic hyperboloid