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