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Advent calendar 2025
19 December
All 2025 advent puzzles
~
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Eve uses the digits 1, 2, 3, 4, 5, 6, 7, 8 and 9 to write five square numbers (using each digit exactly once). What is largest square number that she made?
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The square numbers must be 1, 9, 25, 36, and
784
.
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christmas
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folding tube maps
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volume
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2d shapes
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multiplication
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the only crossnumber
logic
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unit fractions
pentagons
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sum to infinity
palindromes
sums
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products
algebra
time
tournaments
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cards
integers
geometry
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digital products
shape
square numbers
3d shapes
means
powers
money
addition
menace
ave
planes
graphs
arrows
geometric mean
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tiling
mean
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averages
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