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