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