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Q: How many positive four-digit integer palindromes have 12 as the sum of the digits of the munber?

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Six. 1551 2442 3333 4224 5115 6006

A positive integer plus a positive integer is equal to a positive integer. For example, 2 + 2 = 4. The two digits being added together are called the addends, while the answer is called the sum.

There are 90 four-digit palindromes

For there to be palindromes, each digit must be replicated. Therefore there are at most three distinct digits.If there are 3 pairs of different digits, then there are 6 palindromes. If there can be more duplicate digits, then there are 27 palindromes.

The answer is 198.

There are 900 6-digit palindromes.

The digits of the number without any positive or negative sign. It will look just like the positive version of the integer.

sum of individual digit of a positive integer

yes, any positive or negative number is an integer

It is -987. The smallest positive 3-digit integer with unique digits is 102.

900 This explains it. A positive integer is a palindrome if it reads the same forward and backwards such as 1287821 and 4554. Determine the number of 5-digit positive integers which are NOT palindromes. We start by counting the total number of 5 digit positive integers. The first digit is between 1 and 9, so we have 9 choices. Each of the other 4 digits can be anything at all (10 choices for each). This gives us 9(10)4 = 90000 five-digit positive integers. Now we need to count the number of 5 digit palindromes. Again, we have 9 choices for the first digit and 10 choices for each of the next two. The tens and units digits however are fixed by our choices so far. Therefore, there are only 900 five-digit palindromes. Therefore, the total number of five-digit positive integers which are not palindromes is 90000-900 = 89100.

The answer is a negative or positive integer with one or two digits.

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