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examples, and problems from the community.

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Seek simple and succinct solutions in these systems by sussing-out the significant symmetries.

examples, and problems from the community.

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by **Brilliant Staff**

How many 3-digit palindromes are there? (Note: The first digit of a 3-digit number must be nonzero.)

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by **Brilliant Staff**

examples, and problems from the community.

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by **Brilliant Staff**

examples, and problems from the community.

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by **Brilliant Staff**

How many 3-digit palindromes are there where the middle digit is the same as the leading digit?

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by **Brilliant Staff**

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