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