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