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What is the largest integer ever used in a mathematical proof?

Googolplex
Googol
Graham's number
Centillion
Graham's number is an enormous number that arises as an upper bound on the answer of a problem in the mathematical field of Ramsey theory. The number was published in the 1980 Guinness Book of World Records, adding to its popular interest.
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Answers by country

Googolplex
Googol
Graham's number
Centillion
answers
flagAustralia
0%
4%
86%
9%
22
flagPakistan
8%
8%
83%
0%
12
flagGhana
8%
16%
66%
8%
12
flagRepublic of Ireland
0%
35%
64%
0%
14
flagthe United States
17%
25%
50%
6%
103
flagGreece
13%
18%
50%
18%
22
flagIndia
17%
28%
47%
5%
78
flagAustria
28%
27%
41%
2%
73
flagSpain
0%
60%
40%
0%
10
flagGermany
30%
26%
38%
3%
476
flagthe United Kingdom
23%
30%
37%
8%
69
flagthe Netherlands
20%
30%
35%
15%
20
flagCanada
14%
21%
35%
28%
14
flagPoland
12%
37%
33%
15%
6304
flagSwitzerland
22%
34%
32%
10%
50
flagFrance
38%
23%
30%
7%
13

Which number is considered unlucky in East Asia?

3
4
12
40

Which numeral system was in use in ancient Sumer and Babylon?

octal
binary
decimal
sexagesimal

What is the sum of all the numbers on the roulette wheel?

600
666
783
1000

Which system starts up first when you turn on your PC?

Operating system
Antivirus program
ROM Bios (Basic Input/Output System)
TPM (Trusted Platform Module)