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Advent calendar 2017
14 December
All 2017 advent puzzles
~
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There are
204 squares (of any size) in an 8×8 grid of squares
. Today's number is the number of squares in a 13×13 grid of squares
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819
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square numbers
,
squares
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
tiling
floors
determinants
square numbers
coins
xor
people maths
square grids
planes
percentages
pascal's triangle
games
balancing
sets
arrows
remainders
wordplay
clocks
powers
3d shapes
elections
geometric means
advent
factors
rugby
squares
combinatorics
angles
logic
taxicab geometry
multiples
digital clocks
neighbours
coordinates
menace
averages
sums
cubics
scales
chalkdust crossnumber
trigonometry
lines
cards
2d shapes
geometry
functions
prime factors
cryptic clues
symmetry
probabilty
axes
money
means
shape
proportion
addition
even numbers
spheres
circles
cryptic crossnumbers
crossnumbers
lists
algebra
fractions
hexagons
mean
median
decahedra
pentagons
dice
integration
ellipses
sum to infinity
tournaments
division
multiplication
polygons
cube numbers
regular shapes
numbers
indices
dodecagons
star numbers
consecutive numbers
sequences
speed
irreducible numbers
digital products
range
albgebra
parabolas
polynomials
triangle numbers
geometric mean
sport
square roots
integers
folding tube maps
odd numbers
prime numbers
calculus
chocolate
doubling
unit fractions
colouring
gerrymandering
perimeter
time
area
the only crossnumber
crosswords
chess
probability
triangles
factorials
perfect numbers
digits
binary
shapes
products
ave
multiplaction squares
dominos
dates
rectangles
expansions
christmas
partitions
medians
number
books
tangents
quadratics
bases
surds
consecutive integers
palindromes
matrices
differentiation
graphs
volume
quadrilaterals
grids
routes
complex numbers
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