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Advent calendar 2025
2 December
All 2025 advent puzzles
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Eve writes down the numbers from 1 to 10 (inclusive). In total she write down 11 digits.
Noel writes down the number from 1 to 100 (inclusive). How many digits does he write down?
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Noel writes down 9 one-digit numbers, 90 two-digit numbers and 1 three-digit number. In total, these include 1×9 + 2×90 + 3×1 =
192
digits.
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folding tube maps
range
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christmas
even numbers
indices
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volume
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3d shapes
determinants
hexagons
chess
dominos
bases
square grids
clocks
sum to infinity
combinatorics
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medians
speed
tournaments
people maths
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chalkdust crossnumber
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