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A palindrome is a positive integer which reads the same forward and backward, like 12321 or 4884

How many 4-digit palindromes are there?

User Samblg
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1 Answer

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The first digit can be any numeral 1-9, while the second digit can be any of 0-9, so there are
9*10=90 such numbers. The third and fourth digits will mirror the second and third, respectively, so you only need to account for the first two digits.
User GMarsh
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