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