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