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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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numbers
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digits
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Archive
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Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
ellipses
factorials
elections
remainders
sport
products
people maths
cards
determinants
balancing
2d shapes
geometric mean
calculus
mean
lines
grids
colouring
numbers
planes
time
trigonometry
odd numbers
symmetry
even numbers
area
clocks
geometric means
palindromes
division
multiplaction squares
means
integration
digital products
range
indices
percentages
square numbers
bases
unit fractions
dominos
cubics
number
folding tube maps
the only crossnumber
crossnumbers
probabilty
binary
addition
lists
digits
combinatorics
multiples
prime numbers
ave
consecutive integers
irreducible numbers
spheres
quadrilaterals
averages
differentiation
floors
tournaments
cryptic crossnumbers
axes
sums
expansions
integers
parabolas
coins
geometry
sequences
matrices
coordinates
chess
arrows
angles
logic
books
digital clocks
square roots
chocolate
graphs
3d shapes
dodecagons
fractions
shapes
medians
complex numbers
probability
gerrymandering
cube numbers
regular shapes
chalkdust crossnumber
decahedra
cryptic clues
volume
prime factors
quadratics
factors
star numbers
taxicab geometry
powers
tangents
squares
shape
doubling
consecutive numbers
tiling
hexagons
multiplication
median
speed
square grids
triangles
functions
sum to infinity
christmas
proportion
routes
pascal's triangle
advent
neighbours
partitions
circles
polygons
dates
pentagons
sets
wordplay
algebra
crosswords
surds
triangle numbers
scales
perimeter
menace
money
rugby
polynomials
dice
games
perfect numbers
xor
rectangles
albgebra
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