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