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Advent calendar 2018
20 December
All 2018 advent puzzles
~
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Today's number is the sum of all the numbers less than 40 that are not factors of 40.
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730
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numbers
,
factors
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triangles
shapes
clocks
range
doubling
digital clocks
shape
averages
cubics
symmetry
decahedra
sequences
rugby
proportion
wordplay
ellipses
tiling
multiples
probabilty
speed
graphs
even numbers
number
cards
determinants
mean
square grids
floors
rectangles
irreducible numbers
planes
bases
multiplication
cryptic crossnumbers
routes
surds
circles
scales
probability
square numbers
numbers
dice
pentagons
square roots
2d shapes
hexagons
consecutive integers
tangents
sums
division
people maths
gerrymandering
cryptic clues
logic
geometry
coordinates
functions
star numbers
fractions
regular shapes
neighbours
factors
games
quadrilaterals
chalkdust crossnumber
books
advent
folding tube maps
numbers grids
products
balancing
volume
arrows
triangle numbers
tournaments
factorials
spheres
expansions
geometric means
geometric mean
coins
polygons
combinatorics
powers
dodecagons
percentages
3d shapes
crossnumbers
differentiation
quadratics
algebra
sport
menace
indices
chocolate
angles
digits
binary
parabolas
matrices
prime numbers
odd numbers
sets
sum to infinity
albgebra
perimeter
calculus
crosswords
axes
ave
digital products
taxicab geometry
grids
medians
christmas
complex numbers
trigonometry
area
means
integration
dominos
median
the only crossnumber
squares
palindromes
addition
crossnumber
chess
dates
money
elections
partitions
perfect numbers
remainders
lines
pascal's triangle
time
polynomials
integers
cube numbers
colouring
consecutive numbers
unit fractions
Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
square roots
ave
digital products
3d shapes
gerrymandering
cubics
coins
arrows
albgebra
even numbers
star numbers
chocolate
means
algebra
balancing
pentagons
medians
dates
division
clocks
remainders
the only crossnumber
quadratics
regular shapes
percentages
quadrilaterals
differentiation
crossnumber
irreducible numbers
polygons
cards
lines
chess
volume
spheres
symmetry
graphs
expansions
prime numbers
shape
number
speed
partitions
matrices
mean
geometric mean
books
addition
cryptic clues
colouring
combinatorics
dice
neighbours
routes
area
squares
crosswords
consecutive numbers
people maths
perimeter
cube numbers
unit fractions
tournaments
geometry
odd numbers
coordinates
functions
numbers
products
shapes
menace
probability
doubling
sequences
range
wordplay
axes
digits
planes
ellipses
angles
scales
advent
2d shapes
sums
logic
circles
christmas
rugby
grids
sum to infinity
calculus
perfect numbers
crossnumbers
square numbers
integers
consecutive integers
rectangles
complex numbers
averages
surds
bases
binary
dominos
chalkdust crossnumber
trigonometry
digital clocks
multiplication
median
taxicab geometry
integration
polynomials
determinants
indices
decahedra
numbers grids
time
parabolas
probabilty
games
pascal's triangle
folding tube maps
multiples
square grids
tiling
powers
elections
proportion
palindromes
geometric means
cryptic crossnumbers
factorials
triangles
sport
hexagons
sets
fractions
floors
dodecagons
triangle numbers
money
tangents
factors
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