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