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Mathematical Constants Quiz

Name these mathematical constants, mostly named after famous mathematicians
A few of these use a name for a constant which is far less common than their standard name
Quiz by dizzee
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Last updated: December 9, 2020
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First submittedDecember 9, 2020
Times taken45
Average score41.2%
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Symbol
Definition
Alternate definition
Constant
√2
Square root of two
Diagonal of a square of side length 1
Pythagoras' constant
√3
Square root of three
Space diagonal of a cube of side length 1
Theodorus' constant
φ
Positive root of x²=x+1
Diagonal of a pentagon of side length 1
Golden ratio
δₛ
Positive root of x²=2x+1
Height of an octagon of side length 1
Silver ratio
S₃
Positive root of x²=3x+1
Side ratio of rectangle cut into 3 squares and a similar rectangle
Bronze ratio
ρ
Real root of x³=x+1
Side ratio of the larger 2 of 3 unique similar rectangles that partition a square
Plastic ratio
ψ
Real root of x³=x²+1
Approached ratio of consecutive terms in Narayana's cows' sequence
Supergolden ratio
π
x of Euler's formula at identity
Four times the alternating sum of the reciprocals of the odd numbers
Archimedes' constant
e
Sum of the reciprocals of the factorials
Euler's number
ζ(3)
Sum of the reciprocals of the cubes
Apéry's constant
ζ(2)
Sum of the reciprocals of the squares
Solution to the Basel problem
ζ(2)⁻¹
Probability that two integers will be coprime
Hafner–Sarnak–McCurley constant
A, θ
Raised to the integer exponents of three and rounded down always gives a prime
Mills' constant
𝛿
Limiting ratio of each bifurcation interval of the logistic map
Feigenbaum constant
γ
Limiting difference between the harmonic series and natural logarithm
Euler-Mascheroni constant
G, g₆₄
One upper bound on the answer of a combinatorics problem involving higher-dimensional cubes
Graham's number
10¹⁰⁰
Ten duotrigintillion
Googol
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1 Comments
PeregrineFalcon
+1
Level 77
Dec 9, 2020
Lol, who says "Pythagoras's constant"?? Never heard it called that way but I was able to guess it
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