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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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multiplication
square numbers
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odd numbers
consecutive integers
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cube numbers
folding tube maps
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rectangles
pascal's triangle
chess
spheres
ellipses
means
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sets
crossnumbers
routes
division
axes
floors
tiling
digital products
geometric means
clocks
coins
taxicab geometry
money
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calculus
complex numbers
wordplay
geometric mean
circles
grids
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sequences
coordinates
shape
lines
unit fractions
books
2d shapes
percentages
dominos
scales
multiples
symmetry
tangents
the only crossnumber
integration
trigonometry
consecutive numbers
lists
prime factors
people maths
averages
partitions
remainders
rugby
prime numbers
doubling
regular shapes
numbers
shapes
cubics
even numbers
factors
cryptic clues
3d shapes
dodecagons
bases
perfect numbers
chocolate
mean
combinatorics
determinants
triangles
matrices
menace
products
christmas
cards
xor
binary
integers
polynomials
arrows
algebra
sums
balancing
sum to infinity
geometry
medians
sport
advent
functions
chalkdust crossnumber
hexagons
graphs
triangle numbers
decahedra
multiplaction squares
parabolas
expansions
quadratics
planes
ave
indices
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volume
digital clocks
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angles
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fractions
pentagons
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colouring
square grids
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time
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star numbers
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