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