How many 9 digit 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
76	=	12321
79	=	1367631

What is the smallest 9 digit number with 3 digits the same?

smallest 9digit number is 123456789 and the largest 9 digit number is 987654321.

What is the 9 digit smallest number?

As mentioned above, the smallest 9 digit number is called a hundred million. It is written as 1, followed by 8 zeros.

How many times does the digit 9?

Between 1 and 100, the digit 9 occurs in 9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 and 99. ∴ The digit occurs 20 times between 1 and 100.

Are there only 9 numbers?

Simply, 0 through 9 are just one possible representation of numbers, called Base 10. It’s not sacred, but merely convenient and derived from our 10 fingers. There is another system, called senary, that is derived from hand counting also, and corresponds with Base 6.

How can a phone number only have 9 digits?

It depends on the country you live in what do you mean by 9 digits. If you mean 9 digits including the country calling code, which is something in common for every phone number in the same country, than the places you can find 9 digit numbers are Austria and Sweden.

What is the shortest palindrome word?

The shortest palindrome beginning with this string is acbabca.

What is the number 9 rule?

The divisibility rule of 9 states that if the sum of digits of any number is divisible by 9, then the number is also divisible by 9. It helps us in various concepts like finding divisors, HCF, LCM, measurements, and division.

How many two-digit palindromes are there?

For instance 1001 or 69896 are palindromes. All the digits are palindromes (1,2,3,…,9). There are also 9 palindromes with two digits (11,22,33.,99). You can find to every two-digit number one, and only one number with three digits and with four digits. For example: For the number 34 there are 343 and 3443.

What is the smallest n-digit palindromic number?

Smallest N-digit Palindromic Number: On observing carefully, you will observe that for N = 1, the smallest palindromic number will be 0. And for any other value of N, the smallest palindrome will have the first and last digits as 1 and all of the digits in between as 0. Case 1 : If N = 1 then answer will be 0.

What are the first nine terms of the palindromic sequence?

The first nine terms of the sequence 1 2, 11 2, 111 2, 1111 2, form the palindromes 1, 121, 12321, 1234321, (sequence A002477 in the OEIS ) The only known non-palindromic number whose cube is a palindrome is 2201, and it is a conjecture the fourth root of all the palindrome fourth powers are a palindrome with 100000…000001 (10 n + 1).

What is the largest delayed palindrome number?

Any number that never becomes palindromic in this way is known as a Lychrel number. On January 24, 2017, the number 1,999,291,987,030,606,810 was published in OEIS as A281509 and announced “The Largest Known Most Delayed Palindrome”.