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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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proportion
means
unit fractions
colouring
crosswords
factors
remainders
coins
quadrilaterals
tiling
christmas
star numbers
matrices
2d shapes
averages
graphs
calculus
dates
cards
indices
quadratics
rectangles
sport
consecutive numbers
even numbers
coordinates
books
surds
wordplay
menace
expansions
dodecagons
combinatorics
taxicab geometry
axes
square roots
albgebra
clocks
time
integration
chess
people maths
sums
division
planes
grids
differentiation
cryptic crossnumbers
the only crossnumber
area
parabolas
spheres
regular shapes
integers
polygons
numbers
sequences
pentagons
gerrymandering
rugby
squares
dominos
geometry
sets
probability
products
odd numbers
chalkdust crossnumber
digits
doubling
hexagons
pascal's triangle
perimeter
median
decahedra
lines
trigonometry
tangents
partitions
triangles
range
digital products
geometric means
probabilty
factorials
consecutive integers
arrows
palindromes
algebra
multiples
determinants
cube numbers
perfect numbers
games
functions
folding tube maps
speed
shapes
square numbers
binary
balancing
number
dice
circles
crossnumbers
bases
cubics
shape
sum to infinity
mean
triangle numbers
logic
advent
percentages
digital clocks
prime numbers
fractions
polynomials
elections
3d shapes
geometric mean
symmetry
money
crossnumber
multiplication
routes
chocolate
addition
ave
cryptic clues
complex numbers
tournaments
irreducible numbers
floors
volume
scales
angles
ellipses
Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
integers
rectangles
shape
determinants
expansions
menace
scales
quadratics
rugby
ave
angles
spheres
number
axes
routes
polygons
hexagons
sets
3d shapes
consecutive numbers
chocolate
symmetry
coordinates
logic
prime numbers
percentages
crosswords
chalkdust crossnumber
geometric means
sums
complex numbers
even numbers
doubling
gerrymandering
graphs
perimeter
geometric mean
dominos
calculus
remainders
proportion
area
fractions
partitions
floors
chess
multiples
crossnumber
balancing
cryptic crossnumbers
games
cards
tiling
indices
square roots
consecutive integers
lines
algebra
cryptic clues
binary
digits
cubics
mean
triangles
albgebra
tournaments
differentiation
pascal's triangle
2d shapes
geometry
multiplication
digital clocks
digital products
books
median
ellipses
planes
quadrilaterals
circles
integration
perfect numbers
elections
factorials
dodecagons
combinatorics
polynomials
time
factors
speed
dice
bases
coins
sport
the only crossnumber
products
pentagons
averages
shapes
probabilty
unit fractions
sequences
cube numbers
squares
taxicab geometry
irreducible numbers
folding tube maps
money
triangle numbers
addition
odd numbers
decahedra
division
clocks
range
probability
square numbers
sum to infinity
surds
colouring
christmas
trigonometry
dates
grids
advent
volume
numbers
crossnumbers
arrows
wordplay
parabolas
matrices
tangents
functions
means
people maths
palindromes
regular shapes
star numbers
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