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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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rugby
cryptic crossnumbers
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area
square grids
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consecutive integers
taxicab geometry
sets
combinatorics
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percentages
tangents
menace
shapes
routes
factors
elections
chocolate
the only crossnumber
3d shapes
partitions
hexagons
crossnumbers
coins
cubics
multiples
tournaments
range
digital clocks
gerrymandering
time
functions
cryptic clues
matrices
regular shapes
folding tube maps
quadratics
prime numbers
integers
expansions
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lines
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irreducible numbers
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albgebra
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squares
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square roots
trigonometry
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angles
algebra
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cube numbers
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ave
square numbers
symmetry
medians
triangles
dice
scales
floors
integration
decahedra
rectangles
mean
2d shapes
products
chalkdust crossnumber
indices
digits
powers
geometric mean
doubling
circles
quadrilaterals
christmas
pascal's triangle
surds
grids
colouring
averages
dodecagons
calculus
perimeter
star numbers
spheres
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sum to infinity
numbers
Archive
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Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
binary
digital clocks
geometric mean
integration
complex numbers
the only crossnumber
sums
expansions
remainders
square roots
functions
angles
dates
medians
surds
perfect numbers
bases
gerrymandering
triangle numbers
even numbers
symmetry
consecutive integers
taxicab geometry
algebra
division
logic
cube numbers
prime numbers
median
sequences
people maths
games
menace
factorials
dice
ave
range
differentiation
averages
dodecagons
tiling
scales
probability
colouring
consecutive numbers
perimeter
partitions
chalkdust crossnumber
multiples
odd numbers
planes
elections
speed
3d shapes
albgebra
rugby
doubling
folding tube maps
cryptic crossnumbers
trigonometry
clocks
graphs
combinatorics
polynomials
products
lines
cryptic clues
indices
palindromes
axes
decahedra
pentagons
addition
geometric means
shapes
cards
coins
calculus
dominos
powers
grids
numbers grids
crossnumbers
coordinates
tangents
parabolas
volume
multiplication
rectangles
irreducible numbers
books
floors
proportion
christmas
sets
matrices
regular shapes
digits
chess
polygons
mean
integers
square grids
squares
routes
sport
time
wordplay
unit fractions
circles
factors
fractions
sum to infinity
geometry
percentages
hexagons
triangles
star numbers
pascal's triangle
arrows
cubics
advent
tournaments
determinants
chocolate
crosswords
digital products
balancing
means
square numbers
ellipses
quadratics
numbers
quadrilaterals
probabilty
spheres
money
neighbours
2d shapes
area
number
shape
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