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