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Advent calendar 2015
22 December
All 2015 advent puzzles
~
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What is the largest number which cannot be written as the sum of distinct squares?
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128
Tags:
numbers
,
square numbers
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sums
parabolas
hexagons
dodecagons
logic
rectangles
expansions
neighbours
surds
regular shapes
prime factors
binary
calculus
consecutive numbers
cube numbers
floors
cubics
games
routes
shape
elections
geometric means
square numbers
combinatorics
chocolate
shapes
tournaments
colouring
planes
triangle numbers
medians
cryptic crossnumbers
means
matrices
sport
coins
dates
xor
2d shapes
the only crossnumber
3d shapes
tangents
pascal's triangle
digits
partitions
christmas
quadratics
people maths
consecutive integers
folding tube maps
albgebra
time
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symmetry
functions
remainders
triangles
lists
even numbers
pentagons
chalkdust crossnumber
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spheres
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doubling
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indices
cryptic clues
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ave
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taxicab geometry
range
tiling
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speed
palindromes
prime numbers
polygons
squares
factors
perfect numbers
polynomials
trigonometry
percentages
rugby
chess
irreducible numbers
crosswords
gerrymandering
odd numbers
decahedra
multiplaction squares
dice
probability
books
unit fractions
arrows
median
crossnumbers
axes
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money
scales
wordplay
lines
numbers
star numbers
mean
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powers
multiplication
averages
volume
clocks
determinants
digital products
balancing
division
integers
factorials
differentiation
angles
proportion
sets
dominos
addition
probabilty
sum to infinity
complex numbers
quadrilaterals
advent
geometry
fractions
algebra
square roots
graphs
circles
ellipses
digital clocks
menace
integration
Archive
Show me a random puzzle
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Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
spheres
proportion
grids
lists
floors
palindromes
consecutive integers
binary
cards
coordinates
prime factors
prime numbers
tournaments
tiling
complex numbers
geometric means
gerrymandering
angles
doubling
digital products
consecutive numbers
numbers
wordplay
differentiation
hexagons
dates
rectangles
expansions
people maths
speed
axes
determinants
elections
regular shapes
square grids
clocks
arrows
routes
3d shapes
multiplication
balancing
pentagons
decahedra
volume
parabolas
sets
tangents
factorials
products
fractions
number
polynomials
square roots
even numbers
the only crossnumber
mean
dominos
games
money
powers
means
crosswords
neighbours
star numbers
christmas
integration
planes
averages
ave
geometry
dice
digital clocks
cube numbers
probabilty
taxicab geometry
albgebra
median
shapes
square numbers
area
pascal's triangle
rugby
matrices
chocolate
irreducible numbers
books
perfect numbers
digits
scales
squares
time
polygons
circles
triangle numbers
division
sport
multiples
symmetry
advent
perimeter
calculus
logic
functions
addition
surds
lines
chalkdust crossnumber
bases
geometric mean
menace
cubics
2d shapes
ellipses
probability
cryptic clues
cryptic crossnumbers
unit fractions
quadratics
odd numbers
folding tube maps
trigonometry
graphs
crossnumbers
sums
dodecagons
integers
xor
quadrilaterals
colouring
combinatorics
indices
percentages
range
factors
chess
algebra
shape
remainders
partitions
sequences
multiplaction squares
triangles
medians
sum to infinity
coins
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