# How many possible 4 digit numbers are there?

Table of Contents

## How many possible 4 digit numbers are there?

There are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code. Berry analyzed those to find which are the least and most predictable.

## What is the largest 4 digit natural number?

9999

The greatest 4-digit number = 9999. So, we say that we have 9000 four-digit numbers. Therefore, in finding out the numbers we can say 5-digit numbers = 90000 and so on…..

**How many natural numbers have no more than 4 digits?**

There are about or you can say exactly 10000 whole numbers with no more than 4 digits. I know it sounds a bit strange so I’ll explain. The largest 4 digit whole number we can find is 9999. From 0 to 9999 is 10000 numbers( thus 0 included).

### What is the latest 4 digit number?

the greatest four-digit number is 9999.

### What is the best 4 digit number?

Not 8068 — anymore. The safest 4-digit PIN is ‘8068’ — or at least it was, until researchers at Data Genetics told everyone this week. The researchers there went through a set of 3.4 million four-digit personal identification numbers and found “8068” came up only 25 times.

**How many ways are there to form a four digit natural number?**

So, total number of ways to form a four digit natural number = 10×10×10×9 = 9000. Two ways, really. First, we use common sense. The first four digit natural number is 1000 and it is the thousandth natural number. The last four digit number is 9999 and it is the nine thousand nine hundred ninety-ninth natural number.

#### How many 4-digit numbers have 4 different digits?

There are 9 × 9 × 8 × 7 4-digit numbers that have 4 different digits. There are 9 × 9 × 8 4-digit number that have 3 different digits. But this 3 different digits can be place on 6 different ways: aabc, abac, abca, baac, baca, bcaa, so we multiply the number of combintion by 6.

#### Is there a bijection between natural numbers and powers of ten?

For example there is a rather obvious bijection between the Natural numbers and the powers of ten given by n ↔ 10 n, and yet powers of ten ( 100, 1000, 10000, and so on) are few and far between amongst the list of Natural numbers ( 0, 1, 2 …, 98, 99, 100, 101, … ).

**How many 4-digit numbers of the type AAAB are there?**

There are 9 × 9 4-digit numbers of the type aaab. Permutations are: aaab, aaba, abaa, baaa, so there are 4 distinct permutations, which means there are 324 4-digit numbers of the type aaab and its permutation. And finally we have 9 4-digit numbers of the typee aaaa.