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Advent calendar 2025
23 December
All 2025 advent puzzles
~
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153 is equal to the sum of the cubes of its digits: 1
3
+ 5
3
+ 3
3
.
There are three other three-digit numbers that are equal to the sum of the cubes of their digits. What is the largest of these numbers?
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The other three numbers are 370, 371 and
407
.
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colouring
graphs
differentiation
binary
powers
palindromes
prime factors
factorials
factors
angles
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doubling
tiling
coins
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sums
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