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Advent calendar 2024
10 December
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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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The palindromes between 10 and 100 will be the numbers 11, 22, 33, ..., 99. The sum of these is
495
.
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polynomials
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factors
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range
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taxicab geometry
clocks
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sets
logic
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ave
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the only crossnumber
mean
prime numbers
albgebra
grids
differentiation
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