- What is a unique real number?
- Which is the smallest prime number?
- What is the smallest prime number between 1 to 10?
- What are good 4 digit passwords?
- What is a unique number?
- What is the hardest 4 digit password?
- Why 1 is not a prime number?
- Is 1 the smallest prime number?
- What is the most mysterious number?
- What are good number passwords?
- Which type of number is 1?

## What is a unique real number?

Real numbers are closed under addition, subtraction, and multiplication.

That means if a and b are real numbers, then a + b is a unique real number, and a ⋅ b is a unique real number.

For example: 3 and 11 are real numbers.

…

Any time you add, subtract, or multiply two real numbers, the result will be a real number..

## Which is the smallest prime number?

The smallest prime numbers are 2, 3, 5, 7, 11, 13, 17, 19 and 23. The number 2 is the only even prime number. The number 7 has only two factors: 1 and itself. The number 11 has only two factors: 1 and itself.

## What is the smallest prime number between 1 to 10?

The first 1000 prime numbers1101–2022921–407311341–6017922961–8028334914 more rows

## What are good 4 digit passwords?

There are 10,000 four-digit combinations that can be formed using the numbers 0-9, however many use the same ones….List of the 20 most common PINS:12349999111133330000555512126666777711225 more rows•Aug 1, 2013

## What is a unique number?

UNIQUE NUMBERS. If a number An consisting of n consecutive digits in ascending order is subtracted from the number An’ obtained by reversing the digits of An, then the difference is always a constant. This constant is termed as the Unique number Un as reported by me earlier in [1].

## What is the hardest 4 digit password?

If it guesses based on people’s natural inclination to pattern, the hardest to guess is “8068”. For some reason, when a study was done this was the least used 4-digit combination at the time.

## Why 1 is not a prime number?

Proof: The definition of a prime number is a positive integer that has exactly two positive divisors. However, 1 only has one positive divisor (1 itself), so it is not prime.

## Is 1 the smallest prime number?

The smallest prime number defined by modern mathematicians is 2. To be prime, a number must be divisible only by 1 and the number itself which is fulfilled by the number 2.

## What is the most mysterious number?

61746174 is known as Kaprekar’s constant after the Indian mathematician D. R. Kaprekar.

## What are good number passwords?

Way up. Researchers at the data analysis firm Data Genetics have found that the three most popular combinations—“1234,” “1111,” and “0000”—account for close to 20 percent of all four-digit passwords.

## Which type of number is 1?

Main types ): The counting numbers {1, 2, 3, …} are commonly called natural numbers; however, other definitions include 0, so that the non-negative integers {0, 1, 2, 3, …} are also called natural numbers. Natural numbers including 0 are also called whole numbers.