# algebra

posted by .

A palindrome is a number that reads the same forwards as it does backwards. For example, 98789 is a 5-digit palindrome, and 7337 is a 4-digit palindrome. How many 3-digit palindromes are there?

• algebra -

Assuming that we can't start with 0 , or else it would be a 2 - digit number,
there are 9 choices for the 1st, then only 1 at the end
the middle can be any of the 10

number of such numbers
= 9 x 10 x 1 = 90

## Similar Questions

1. ### Palindromes

What is a palindrome that means excitement. What is a palindrome for Old cats who are forgetful (2 words) What is a palindrome for a hippie with no name (what would he say?
2. ### PALINDROMES

ON THE NUMERS 10 AND 100, HOW MANY OF THEM ARE PALINDROMES?
3. ### number theory

How do you prove that any palindrome, a number that reads the same backwards and forwards, with an even number of digits is divisible by 11?
4. ### Maths

A palindrome number is one that reads the same both forwards and backwards- for instance. 797 or 44. How many palindromic numbers are there between: a) 10 and 400 b) 10 and 1000 Thanks
5. ### Math

It is a 5 digit no. ,palindrome,divisible by 4,10 digit is cube root of 1 digit,product of 100 digit and 1 digit is 54 ,sum of hundred and ones digit is 15.what is the number?
6. ### math

which digits are always the same in a 4 digit palindrome?
7. ### COmbinatorics

A DNA chain is a string of As, Ts, Gs, and Cs. How many DNA chains are there of length 12 which have the following properties?
8. ### Algebra - Math HW HELP!

1) It is a five-digit whole number. 2) It is a palindrome. 3) Its tens digit is the cube root of a one-digit number. 4) The product of its hundreds digit and its ones digit is 54. 5) The sum of its hundreds digit and its ones digit …
9. ### algebra

It is a five digit whole number 1. It is a palindrome 2. It's hundreds digit is a multiple of 5 3. The product of its one digit and 8 is 12 greater than the square of its ones digit 4. The product of its thousands digit and 18 is 45 …
10. ### math

Numbers that are palindromes read the same forward and backward. For example, 30203 is a five digit palindrome. If a single number is chosen randomly from the set of all three-digit numbers, find the probability that it will be palindromic. …

More Similar Questions