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