mscroggs
.co.uk
mscroggs
.co.uk
blog
puzzles
academic
talks
contact
subscribe
↓ ☰ ↓
subscribe
Loading image...
Advent calendar 2015
22 December
All 2015 advent puzzles
~
More information
What is the largest number which cannot be written as the sum of distinct squares?
Show answer
Hide answer
128
Tags:
numbers
,
square numbers
Archive
Show me a random puzzle
Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
combinatorics
integers
functions
lines
square grids
sum to infinity
wordplay
probabilty
scales
powers
graphs
volume
perimeter
3d shapes
crossnumbers
money
sequences
irreducible numbers
pentagons
doubling
spheres
coins
range
coordinates
trigonometry
cards
chess
geometric mean
odd numbers
quadrilaterals
planes
probability
algebra
menace
number
decahedra
colouring
parabolas
books
crosswords
means
multiplication
multiplaction squares
star numbers
indices
differentiation
grids
hexagons
fractions
time
proportion
matrices
2d shapes
shapes
regular shapes
tiling
complex numbers
neighbours
palindromes
tangents
elections
folding tube maps
cryptic clues
chalkdust crossnumber
division
xor
cube numbers
perfect numbers
clocks
games
remainders
integration
dice
ave
geometry
binary
pascal's triangle
albgebra
calculus
lists
shape
determinants
consecutive integers
people maths
multiples
sums
dominos
arrows
percentages
symmetry
geometric means
mean
addition
sport
polygons
factors
dodecagons
axes
median
rectangles
factorials
chocolate
tournaments
numbers
unit fractions
christmas
area
sets
prime numbers
taxicab geometry
angles
advent
expansions
partitions
circles
even numbers
dates
medians
surds
triangle numbers
cubics
averages
digits
consecutive numbers
logic
digital products
square numbers
speed
floors
bases
routes
digital clocks
polynomials
square roots
the only crossnumber
products
balancing
prime factors
cryptic crossnumbers
rugby
gerrymandering
ellipses
quadratics
triangles
squares
Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
trigonometry
multiplication
sequences
colouring
medians
tiling
pentagons
remainders
powers
quadratics
floors
menace
cube numbers
speed
coordinates
percentages
cubics
symmetry
irreducible numbers
number
digital clocks
surds
quadrilaterals
odd numbers
chalkdust crossnumber
tangents
albgebra
triangles
cards
coins
crossnumbers
square numbers
money
combinatorics
wordplay
dodecagons
squares
people maths
decahedra
determinants
time
median
probability
matrices
differentiation
logic
consecutive integers
binary
perfect numbers
hexagons
elections
geometric mean
neighbours
consecutive numbers
polygons
probabilty
scales
axes
even numbers
area
rectangles
cryptic crossnumbers
gerrymandering
digital products
star numbers
numbers
products
sets
complex numbers
xor
triangle numbers
games
polynomials
indices
prime factors
range
sum to infinity
unit fractions
expansions
lines
clocks
balancing
multiples
parabolas
integration
spheres
integers
chocolate
dominos
means
digits
grids
graphs
square roots
advent
shapes
perimeter
dates
regular shapes
planes
calculus
volume
lists
books
the only crossnumber
chess
multiplaction squares
partitions
mean
2d shapes
square grids
averages
sport
doubling
factorials
crosswords
tournaments
cryptic clues
algebra
angles
shape
folding tube maps
addition
fractions
geometry
routes
christmas
geometric means
pascal's triangle
ellipses
arrows
taxicab geometry
sums
functions
circles
bases
factors
palindromes
rugby
3d shapes
prime numbers
division
ave
dice
proportion
© Matthew Scroggs 2012–2026