# Number Theory

• 4

### How to Tell If a Number Is a Pentagonal Number

2 years ago

How to tell if N is a pentagonal number. Formula for pentagonal numbers and inverse formula for determining if a given number is pentagonal. If yes, the formula gives the index.

• 16

### What Is a Triangular Number?

14 months ago

Triangular Numbers do not need to cause confusion! Come in and see some of them.

• 0

### How to Teach Numbers to Young Kids

2 years ago

Young kids love numbers. They love counting too. Kids always tell how old they are using their fingers. These are signs that the young kids can easily learn numbers.

• 2

### Math Facts About the Number 29

3 years ago

What's special about the number 29? Plenty! Twenty-nine is not only prominent in pop culture, but has deeper mathematical significance too. Like many prime numbers such as 3, 7, and 13, the number 29 may be seen as...

• 1

### Beatty Sequences: Mathematical Curiosities with Irrational Numbers and Integers

24 months ago

A partition of a set of numbers is when you divide it into two or more non-overlapping subsets where every element of the original set is contained in one subset. Both finite and infinite sets can be partitioned. For...

• 0

### Mathematical Properties of the Number 288

3 months ago

The number 288 has many interesting properties that make it a favorite number among numerologists and mathematicians. Because 288 is 2 times 144, the number 288 has special significance in traditions that venerate the...

• 11

### What's Special About the Number 6174?

2 years ago

The number 6174 looks rather ordinary at first glance, but is actually quite a singular number. Known as Kaprekar's constant, 6174 is the convergent value of Kaprekar's Routine, a process that you apply to a 4-digit...

• 2

### Difference of Squares of Two Primes

3 years ago

Here's a curious trick you can try with any pair of prime numbers greater than 3: Square the two prime numbers then find the difference. No matter what two prime numbers you start with, the difference will always be...

• 4

### Fun Facts About the Number 420

8 days ago

Like the number 666, the number 420 is significant in Western culture. Although it is most commonly associated with cannabis culture, the number 420 also has many curious mathematical properties. Here are some fun facts...

• 0

### The Magic of Prime Numbers

3 years ago

Distribution of prime numbers among the set of natural numbers is one of the most intriguing questions in the number theory and in the whole mathematics. Reportedly, a German mathematician D. Hilbert (who presented the...