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Advent calendar 2017
16 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 rectangles (of any size) in a 2×19 grid of squares
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570
Tags:
square numbers
,
squares
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axes
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elections
rugby
dice
division
ave
chess
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square grids
averages
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decahedra
rectangles
products
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even numbers
spheres
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regular shapes
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cubics
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geometric mean
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folding tube maps
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3d shapes
arrows
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irreducible numbers
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square numbers
digital clocks
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albgebra
chalkdust crossnumber
area
digital products
bases
number
mean
volume
integration
odd numbers
advent
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xor
the only crossnumber
star numbers
money
cryptic clues
dates
christmas
binary
sets
triangles
balancing
planes
combinatorics
lines
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complex numbers
remainders
hexagons
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logic
sum to infinity
sums
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speed
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Archive
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Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
digits
dates
balancing
triangle numbers
consecutive numbers
digital products
rugby
functions
digital clocks
prime factors
sum to infinity
doubling
squares
quadratics
axes
cryptic clues
fractions
perimeter
dice
coordinates
routes
number
prime numbers
arrows
cubics
sport
speed
percentages
tangents
wordplay
graphs
algebra
grids
differentiation
cryptic crossnumbers
sums
means
chess
the only crossnumber
multiplication
indices
crossnumbers
probabilty
money
crosswords
chocolate
spheres
planes
surds
scales
pentagons
volume
sequences
coins
geometry
consecutive integers
clocks
palindromes
dominos
area
square numbers
advent
probability
median
odd numbers
regular shapes
people maths
perfect numbers
cube numbers
hexagons
powers
even numbers
folding tube maps
square roots
expansions
3d shapes
sets
menace
division
2d shapes
shape
christmas
tiling
square grids
determinants
averages
elections
bases
gerrymandering
rectangles
quadrilaterals
geometric means
xor
lists
circles
cards
pascal's triangle
logic
ave
taxicab geometry
numbers
proportion
time
floors
dodecagons
chalkdust crossnumber
integers
multiples
parabolas
ellipses
decahedra
lines
tournaments
star numbers
matrices
integration
combinatorics
trigonometry
mean
triangles
calculus
neighbours
addition
products
range
angles
binary
complex numbers
factorials
unit fractions
remainders
albgebra
polygons
geometric mean
colouring
irreducible numbers
shapes
multiplaction squares
factors
polynomials
symmetry
partitions
games
medians
books
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