Q: How many palindromic 4 digit numbers are there?

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40. Excluding numbers starting with 0.

The sum of all palindromic numbers from 1001 to 9999 is 495000.

1001 - 1991, etc = 10, x (2,3,4,5,6,7,8,9) 8 = 80

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17

Related questions

40. Excluding numbers starting with 0.

a 8-digits palindromic number is a number consisting of a 4-digits number written and then written backward, i.e. 1234 4321 so there are as many palindromic 8-digits numbers as 4-digits numbers so from 1000 to 9999, so there are 8999 palindromic 8 digits number (I assumed that 00011000 is not to be considered as a valid 8 digit number)

there are 10 palindromic numbers between 9000 and 10000 9009,9119,9229,9339,9449,9559,9669,9779,9889,9999!!!

1001 is the smallest 4 digit palindromic number.

The sum of all palindromic numbers from 1001 to 9999 is 495000.

1001 - 1991, etc = 10, x (2,3,4,5,6,7,8,9) 8 = 80

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17

Assuming leading zeros don't count: 1001

-11

3 digit numbers are lessthan 4 digit numbers

There are 2941 4-digit numbers such no two of its digits differ by 1.