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The rainbow is violet on the inside of its arc. What color is it on the outside?

blue
green
yellow
red
Visible light spans from red to violet. It is easy to remember, since wavelengths just outside the visible range are called infrared and ultraviolet.
Hà Linh Chi
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Very interesting!
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Answers by country

blue
green
yellow
red
answers
flagIndia
10%
7%
5%
75%
420
flagGhana
8%
0%
0%
75%
12
flagthe United States
16%
6%
10%
65%
579
flagCanada
20%
6%
3%
65%
29
flagMalaysia
13%
4%
13%
65%
23
flagUnknown
19%
6%
9%
64%
31
flagAustralia
11%
11%
14%
62%
35
flagthe United Kingdom
20%
9%
10%
59%
159
flagGreece
18%
9%
18%
54%
22
flagGermany
20%
10%
11%
52%
134
flagPakistan
6%
16%
25%
51%
31
flagAustria
16%
11%
16%
50%
18
flagSwitzerland
8%
16%
25%
50%
12
flagthe Philippines
34%
5%
7%
48%
52
flagthe Netherlands
20%
20%
12%
48%
25
flagPoland
18%
10%
22%
47%
16587
flagSouth Africa
33%
5%
16%
44%
18

What color is octopus blood?

red
blue
green
yellow

Why is White Sands Desert in New Mexico so purely white?

it is gypsum
it is very fine grained sand
it iswhite quartz
it is an optical illusion

Who is more likely to be colorblind?

men
women
sailors
everyone with the same probability

In which country are the following surnames very common: "unbeatable", "rock", "iron", "falcon", "steel" and "thunderbolt"?

Norway
Turkey
Hungary
Japan