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Advent calendar 2018
23 December
All 2018 advent puzzles
~
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Today's number is the area of the largest area rectangle with perimeter 46 and whose sides are all integer length.
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The largest rectangle will be 11 by 12 and have area
132
.
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2d shapes
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geometry
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area
,
perimeter
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Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
complex numbers
decahedra
ave
binary
proportion
algebra
balancing
factors
coins
chess
chocolate
pentagons
menace
doubling
tiling
square roots
addition
digits
unit fractions
taxicab geometry
palindromes
surds
perimeter
arrows
cryptic crossnumbers
clocks
determinants
polynomials
axes
coordinates
multiples
crosswords
cube numbers
money
cryptic clues
dates
squares
number
star numbers
3d shapes
integers
differentiation
calculus
combinatorics
indices
quadratics
tournaments
sums
crossnumbers
graphs
probability
geometric mean
odd numbers
rectangles
shapes
speed
cards
floors
scales
consecutive integers
geometric means
lines
partitions
means
percentages
prime numbers
consecutive numbers
multiplication
perfect numbers
square numbers
sum to infinity
elections
planes
symmetry
christmas
triangles
bases
fractions
expansions
sets
albgebra
mean
routes
digital clocks
averages
rugby
logic
integration
circles
dominos
matrices
people maths
wordplay
regular shapes
hexagons
median
polygons
sport
time
volume
angles
quadrilaterals
range
remainders
digital products
advent
chalkdust crossnumber
books
2d shapes
ellipses
even numbers
geometry
cubics
games
tangents
trigonometry
irreducible numbers
crossnumber
dodecagons
spheres
sequences
grids
folding tube maps
parabolas
shape
pascal's triangle
products
probabilty
area
gerrymandering
the only crossnumber
division
numbers
factorials
triangle numbers
functions
dice
colouring
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