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Advent calendar 2017
11 December
All 2017 advent puzzles
~
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Two more than today's number is the reverse of two times today's number.
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497
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Most recent collections
Advent calendar 2025
Advent calendar 2024
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List of all puzzles
Tags
numbers
perfect numbers
advent
scales
lines
squares
crosswords
coordinates
neighbours
medians
symmetry
graphs
probability
tournaments
matrices
complex numbers
decahedra
ellipses
time
chess
chocolate
doubling
sets
even numbers
fractions
volume
sport
triangle numbers
shapes
geometry
folding tube maps
wordplay
prime numbers
range
square roots
shape
multiplaction squares
probabilty
people maths
perimeter
geometric mean
pentagons
means
odd numbers
dice
games
routes
logic
calculus
functions
lists
sum to infinity
chalkdust crossnumber
remainders
arrows
rugby
clocks
floors
angles
ave
sequences
algebra
factorials
dates
factors
bases
cube numbers
money
binary
albgebra
sums
rectangles
trigonometry
axes
cryptic crossnumbers
prime factors
indices
consecutive integers
multiplication
differentiation
gerrymandering
speed
number
circles
the only crossnumber
menace
balancing
square numbers
taxicab geometry
cubics
triangles
pascal's triangle
addition
tiling
polynomials
combinatorics
dodecagons
multiples
digital products
integration
quadratics
products
mean
surds
tangents
unit fractions
expansions
area
digital clocks
median
percentages
regular shapes
proportion
coins
christmas
hexagons
averages
2d shapes
powers
digits
3d shapes
square grids
star numbers
grids
polygons
determinants
irreducible numbers
elections
planes
colouring
books
geometric means
parabolas
division
crossnumbers
palindromes
partitions
consecutive numbers
dominos
cryptic clues
spheres
xor
integers
cards
quadrilaterals
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