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Advent calendar 2018
2 December
All 2018 advent puzzles
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Today's number is the area of the largest dodecagon that it's possible to fit inside a circle with area \(\displaystyle\frac{172\pi}3\).
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The largest dodecagon will be regular. It's area will be
172
.
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area
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▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2020
Advent calendar 2019
Sunday Afternoon Maths LXVII
Coloured weights
Not Roman numerals
Advent calendar 2018
List of all puzzles
Tags
squares
floors
unit fractions
perimeter
crossnumber
triangles
chocolate
dodecagons
perfect numbers
cryptic clues
star numbers
prime numbers
combinatorics
multiples
regular shapes
sum to infinity
polygons
bases
integration
crossnumbers
colouring
rugby
crosswords
time
circles
quadrilaterals
tiling
dominos
averages
probability
means
surds
volume
square roots
indices
palindromes
chalkdust crossnumber
logic
gerrymandering
functions
advent
irreducible numbers
arrows
grids
hexagons
books
routes
numbers
trigonometry
division
differentiation
mean
fractions
digital clocks
parabolas
geometry
folding tube maps
cryptic crossnumbers
shapes
products
christmas
planes
range
taxicab geometry
quadratics
factors
probabilty
area
symmetry
people maths
integers
sequences
the only crossnumber
percentages
cards
ellipses
spheres
dates
elections
speed
shape
scales
coordinates
money
sums
graphs
number
ave
menace
dice
remainders
angles
cube numbers
addition
games
chess
balancing
algebra
multiplication
3d shapes
median
pascal's triangle
odd numbers
factorials
wordplay
lines
proportion
rectangles
partitions
digits
square numbers
sport
coins
2d shapes
calculus
clocks
triangle numbers
doubling
complex numbers
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