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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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numbers
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algebra
rugby
range
taxicab geometry
wordplay
2d shapes
logic
perfect numbers
star numbers
dodecagons
sets
integration
calculus
remainders
trigonometry
expansions
rectangles
irreducible numbers
area
square numbers
lists
polynomials
lines
cube numbers
dice
tiling
odd numbers
surds
combinatorics
geometric mean
shape
factors
integers
decahedra
cards
medians
square grids
3d shapes
scales
digital clocks
functions
cryptic clues
coordinates
tournaments
the only crossnumber
games
menace
chalkdust crossnumber
probabilty
floors
sums
hexagons
factorials
quadrilaterals
dominos
dates
pentagons
geometry
angles
crosswords
chess
triangle numbers
volume
binary
people maths
tangents
square roots
christmas
ave
cubics
unit fractions
multiplication
percentages
grids
albgebra
sum to infinity
prime numbers
number
numbers
chocolate
median
books
routes
gerrymandering
perimeter
products
digits
proportion
shapes
powers
xor
planes
circles
time
money
crossnumbers
arrows
matrices
spheres
clocks
graphs
folding tube maps
consecutive numbers
consecutive integers
fractions
complex numbers
speed
indices
advent
averages
division
elections
digital products
multiplaction squares
polygons
multiples
axes
prime factors
mean
sequences
balancing
quadratics
sport
parabolas
cryptic crossnumbers
coins
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means
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even numbers
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