Table of Contents

## How many 7 digit numerical palindromes are there?

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, … (sequence A002113 in the OEIS). Palindromic numbers receive most attention in the realm of recreational mathematics….Other bases.

70 | = | 1 |
---|---|---|

73 | = | 111 |

74 | = | 777 |

76 | = | 12321 |

79 | = | 1367631 |

**How many palindromic numbers are there?**

You can conclude that there are 900 palindromes withfive and 900 palindromes with six digits. You have 9+9+90+90+900+900 = 1998 palindromes up to one million. That’s 0,1998 %. About every 500th number is a palindrome.

**How many 7 digit numbers are formed?**

Find the number of seven-digit numbers which can be formed with the sum of the digits being even. Hence there are 9000000 seven-digit numbers that exist. So total number of 7 digit numbers=9999999 – 1000000+1).

### What is the smallest 7 digit palindrome number?

765 0 567. Hope this helps you ! Thank you for the edit – BrainlyThug ｡ ◕‿◕｡

**How many palindromes are there between 1000 and 9999?**

Percentage

Number of digits | Range of numbers | Cumulative palindromic numbers |
---|---|---|

1 | 0-9 | 10 |

2 | 10-99 | 19 |

3 | 100-999 | 109 |

4 | 1000-9999 | 199 |

**How many 5 digit palindromic numbers are there?**

The answer is that there are 900 five-digit palindromes. 10001 10101 10201 10301 10401 10501 10601 10701 10801 10901 11011 11111 11211 11311 11411 11511 11611 11711 11811 11911 …..

#### How many palindromes are there of 5 digits?

The answer is that there are 900 five-digit palindromes.

**How many 6 digit even palindrome numbers are there?**

we have 10 possibilities for the 2nd and 3rd digit respectively and then we just have the repeat of digits in reversed order and thus they can be chosen in only 1 way. So, we have 4*10*10*1*1*1 = 400 different 6 digit even palindromes.

**How many 7 digit numbers can be formed using 0 9?**

Answer: nine million. You mean how many possible 7 digit numbers using 0-9. 10^7 or 10 million, or 10,000,000 (one followed by seven zeroes) which is a set that includes 0000000.

## How many 7 digit number can be formed by using the number 1,2 and/or 3?

We know that the factorial can be written by the formula n! =n×(n−1)! Therefore, the number of different seven-digit numbers that can be written using only three digits 1,2 and 3 is 672. Thus, option (A) is the correct answer.

**How many 4 digit palindromes are there?**

There are likewise 90 palindromic numbers with four digits (again, 9 choices for the first digit multiplied by ten choices for the second digit.

**How many palindromic numbers are there between 10 and 1000?**

There is a pattern. There are exactly 10 palindromes in each group of 100 numbers(after 99). Thus, there will be 9 sets of 10, or 90, plus the 18 from numbers 1 to 99, for a total of 108 palindromes between 1 and 1,000.

### How many possible palindrome numbers can be formed with 7 digits?

A seven digit palindromic number ABCnCBA, can have ABC equal any number between 100 and 999. So (999 – 100 + 1) = 900 possible values. For each of these 900, n can be any number between 0 and 9. 10 possible values. How many 5 digit palindrome numbers can be formed?

**What is a palindromic number?**

Although palindromic numbers are most often considered in the decimal system, the concept of palindromicity can be applied to the natural numbers in any numeral system. Consider a number n > 0 in base b ≥ 2, where it is written in standard notation with k +1 digits ai as:

**How many powers of 7 are palindromic?**

In base 18, some powers of seven are palindromic: And in base 24 the first eight powers of five are palindromic as well:

#### Is every positive integer the sum of three palindromic numbers?

In 2018, a paper was published demonstrating that every positive integer can be written as the sum of three palindromic numbers in every number system with base 5 or greater. ^ (sequence A065379 in the OEIS) The next example is 19 digits – 900075181570009.