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