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Advent calendar 2015
3 December
All 2015 advent puzzles
~
More information
In August, I wrote about
MENACE
, a machine learning robot built from matchboxes which plays noughts and crosses. How many matchboxes are needed to build MENACE?
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304
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menace
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Archive
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Most recent collections
Advent calendar 2025
Advent calendar 2024
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List of all puzzles
Tags
ellipses
crossnumbers
consecutive numbers
remainders
lists
chess
sets
rugby
albgebra
products
ave
speed
chalkdust crossnumber
area
grids
functions
coordinates
squares
games
xor
shapes
integers
chocolate
square grids
numbers
books
proportion
routes
sequences
parabolas
tangents
doubling
cryptic clues
volume
multiplaction squares
geometry
expansions
surds
floors
cube numbers
star numbers
unit fractions
digits
cubics
axes
triangles
cards
bases
multiplication
fractions
tournaments
dice
logic
matrices
angles
palindromes
range
2d shapes
square numbers
tiling
quadratics
arrows
division
dates
prime factors
polynomials
regular shapes
multiples
crosswords
symmetry
sum to infinity
partitions
medians
neighbours
time
probabilty
integration
pascal's triangle
indices
menace
cryptic crossnumbers
triangle numbers
median
perfect numbers
colouring
folding tube maps
differentiation
gerrymandering
wordplay
calculus
rectangles
sums
percentages
3d shapes
powers
scales
planes
addition
binary
factors
averages
geometric means
trigonometry
sport
dominos
means
people maths
hexagons
the only crossnumber
consecutive integers
advent
dodecagons
determinants
perimeter
combinatorics
shape
prime numbers
circles
digital clocks
number
clocks
polygons
factorials
even numbers
lines
spheres
elections
mean
coins
pentagons
probability
money
odd numbers
digital products
quadrilaterals
geometric mean
taxicab geometry
graphs
complex numbers
christmas
algebra
square roots
decahedra
irreducible numbers
balancing
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