## What is the 4 digit greatest number?

9999The greatest 4-digit number = 9999..

## What is the probability of guessing a 6 digit number?

Since the odds of getting each digit is 1/10, you multiply 1/10 by itself 6 times. There’s literally a one in a million chance of guessing the PIN correctly. Good luck.

## What is the rarest number?

Other examples of rare numbers are 65, 621770, 281089082, 2022652202, 868591084757, 872546974178 … (Sequence A035519 of OEIS). If we consider palindromic rare numbers, there are infinitely many rare numbers.

## What is the most secure 4 digit code?

8068The 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.

## What are the odds of guessing a 4 digit PIN?

Research suggests thieves can guess one in five PINs by trying just three combinations. How easy would it be for a thief to guess your four-digit PIN? If he were forced to guess randomly, his odds of getting the correct number would be one in 10,000—or, if he has three tries, one in 3,333.

## How many combinations are in a 4 digit number?

10,000 possible combinationsThere are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code.