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