
Fact 
Category 
Date 

1 
A googol contains a 1 followed by 100 zeros. 
Science > Math 
05/31/08 

2 
A Klein bottle is a nonorientable surface with no distinct "inner" and "outer" sides. 
Science > Math 
11/16/08 

3 
A magic square is a square grid filled with the numbers 1 through N^2, such that each row, diagonal, and column add up to the same number. 
Science > Math 
02/15/21 

4 
A number is a triangular number if the sum of one and the product of eight and the number is an odd square number. 
Science > Math 
01/10/17 

5 
A prime number is a number (other than the number 1) that has no numbers that divide evenly into itself besides itself and one. 
Science > Math 
09/25/08 

6 
A surface with only one side and one edge is known as a Möbius strip. 
Science > Math 
06/15/08 

7 
A/An equilateral triangle is one in which all three sides are of an equal length. 
Science > Math 
06/11/08 

8 
A/An isosceles triangle has exactly two sides that are equal in length. 
Science > Math 
06/05/08 

9 
A/An scalene triangle has no sides that are the same length. 
Science > Math 
06/06/08 

10 
An amblygon is another word for a(n) obtuse triangle. 
Science > Math 
11/10/11 

11 
Fermat's Last Theorem states that for any integer value of n greater than 2, there are no nonzero integer solutions for x^n + y^n = z^n. 
Science > Math 
05/29/08 

12 
Goldbach's conjecture states that every even number greater than 2 is the sum of two prime numbers. 
Science > Math 
09/14/08 

13 
Hipparchus invented trigonometry to describe how the planets move. 
Science > Math 
09/21/08 

14 
Pi, the mathematical constant, is an irrational number. 
Science > Math 
09/21/08 

15 
Spherical trigonometry, studies triangles on spheres, and is important in astronomy and navigation. 
Science > Math 
11/01/08 

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