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Puzzles

10 December

A number is a palindrome if it's the same when its digits are written in reverse order.
What is the sum of all the numbers between 10 and 100 that are palindromes?

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22 December

Today's number is a palindrome. Today's number is also the number of palindromes between 111 and 11111 (including 111 and 11111).

14 December

What is the only palindromic three digit prime number which is also palindromic when written in binary?

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