Table of Contents

- 1 What is 2 digit prime number?
- 2 What is the greatest two digit number?
- 3 Which is the greatest digit prime number?
- 4 How many two digit prime numbers are there?
- 5 How many 2 digits number are there?
- 6 How many 2 digit prime numbers are there whose digits are prime?
- 7 What is the largest 2 digit composite number?
- 8 What is the smallest and biggest 2 digit prime number?

## What is 2 digit prime number?

Now, we can observe that the greatest two digit prime number is 97. So, the correct answer is “97”. Note: The greatest two digit natural number is 99.

### What is the greatest two digit number?

99

The largest 2-digit number is 99 as the next number is 100 which is a 3-digit number. The smallest two-digit number is 10 because the previous number is 9 which is a one-digit number.

#### Which is the greatest digit prime number?

The largest known prime number (as of September 2021) is 282,589,933 − 1, a number which has 24,862,048 digits when written in base 10. It was found via a computer volunteered by Patrick Laroche of the Great Internet Mersenne Prime Search (GIMPS) in 2018.

**What is the smallest and biggest 2-digit prime number?**

Now, the smallest 2-digit prime number is 11 and the greatest 2-digit prime number is 97.

**What is the lowest 2-digit prime number?**

11

Correct answer: The smallest two digit prime number is 11.

## How many two digit prime numbers are there?

∴ There are “9” two-digit prime numbers are there between 10 to 100 which remain prime numbers when the order of their digits is reversed….4.6.

11 | |
---|---|

13 | 31 |

79 | 97 |

### How many 2 digits number are there?

The total number of two digit numbers is 90. From 1 to 99 there are 99 numbers, out of which there are 9 one-digit numbers, i.e., 1, 2, 3, 4, 5, 6, 7, 8 and 9. If one digit numbers are subtracted from 99 we get 90 two-digit numbers.

#### How many 2 digit prime numbers are there whose digits are prime?

Detailed Solution. A prime number is a number that has only two factors 1 and itself. As every number is a factor of itself. ∴ There are “9” two-digit prime numbers are there between 10 to 100 which remain prime numbers when the order of their digits is reversed.

**What is the smallest 2 digit prime number?**

**What is the greatest prime number between 1 and 10?**

7

The greatest prime number between 1 and 10 is 7.

## What is the largest 2 digit composite number?

Since the factors of 99 are 1 and 99, and 33 and 3. Therefore, 99 is the largest 2-digit composite number.