I have shamelessly stolen QM's new quiz format idea. Feel free to make similar quizzes (especially if you want to make an easier version). For each category, select the answer that does not belong.
Keep scrolling down for answers and more stats ...
Save Your Stats
Email Address
Screen Name
Password
Confirm Password
Language
Weekly e-mails about new quizzes?
1. Prime numbers
91 = 7 × 13
91
19
79
97
2. Triangle centres (a triangle centre is a point that can be defined as the "centre" of the triangle by some metric)
"Epicentre" is a term used in seismology, in connection to earthquakes. It has nothing to do with triangles.
Circumcentre
Centroid
Orthocentre
Epicentre
3. Distributions in statistics
Binomial distribution
Poisson distribution
Conjunct distribution
Standard normal distribution
4. "Fundamental" theorems
Fundamental theorem of geometry
Fundamental theorem of calculus
Fundamental theorem of arithmetic
Fundamental theorem of algebra
5. Real numbers
There are many mathematical formalisations of the concept of infinity, but it is certainly not a real number.
∞
0
π
Googolplex
6. Things that can be represented by a symbol commonly found on a QWERTY keyboard
A limit is usually denoted by "lim"
Subtract
Greater than
Limit
Factorial
7. Constants named after individuals
There is a category of numbers called Fermat numbers, but it doesn't refer to a specific constant.
Skewes's number
Euler's number
Fermat's number
Graham's number
8. Mathematicians who made significant contributions to number theory
As a mathematician, Newton is notable mostly for inventing calculus.
Isaac Newton
Pierre de Fermat
Carl Friedrich Gauss
Leonhard Euler
9. Regular (Platonic) three-dimensional shapes
It is impossible to construct a regular enneahedron (which would be a nine-faced shape)
Enneahedron
Tetrahedron
Cube
Icosahedron
10. Square numbers
Square numbers can never end with the digit 2.
1234321
16384
0
4792
11. Things there are known to be infinitely many of
It is not known whether there are infinitely many perfect numbers or not.
Prime numbers
Perfect numbers
Rational numbers between 0.499 and 0.501
Digits in the full decimal expansion of π
12. Theories in maths
Graph theory
Girth theory
Galois theory
Group theory
13. Mathematicians of the 20th century
Riemann died in 1866.
Paul Erdős
Bernhard Riemann
Srinivasa Ramanujan
G.H. Hardy
14. Mathematical terminology relating to vegetation
As of yet, there is no mathematical object commonly called a "bud". Trees are found in graph theory, fields are found in group theory and most people have heard of square roots.
Root
Field
Tree
Bud
15. Trigonometric functions
There is no such thing as a bicosine. The arctangent is the inverse function of the tangent and the cosecant of an angle is equal to one divided by the sine of the angle.