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Advent calendar 2016
1 December
All 2016 advent puzzles
~
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One of the digits of today's number was removed to leave a two digit number. This two digit number was added to today's number. The result was 619.
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563
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Advent calendar 2025
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List of all puzzles
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routes
volume
perfect numbers
shape
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dodecagons
polygons
dice
the only crossnumber
axes
sums
algebra
clocks
dates
rectangles
decahedra
integration
percentages
shapes
parabolas
chalkdust crossnumber
matrices
lines
surds
spheres
advent
indices
square roots
elections
grids
taxicab geometry
logic
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cryptic clues
cryptic crossnumbers
planes
proportion
sequences
christmas
coordinates
crosswords
colouring
dominos
albgebra
time
money
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prime factors
factorials
gerrymandering
square grids
digital clocks
2d shapes
bases
expansions
graphs
mean
medians
books
circles
menace
fractions
consecutive numbers
area
balancing
functions
folding tube maps
geometric means
arrows
rugby
neighbours
tiling
multiplication
averages
squares
quadrilaterals
triangles
xor
number
lists
ave
addition
wordplay
sport
symmetry
means
complex numbers
multiplaction squares
square numbers
probabilty
3d shapes
remainders
determinants
digits
irreducible numbers
chess
sets
geometric mean
perimeter
odd numbers
multiples
regular shapes
crossnumbers
speed
numbers
factors
games
powers
palindromes
triangle numbers
combinatorics
products
floors
tournaments
ellipses
pentagons
prime numbers
unit fractions
chocolate
geometry
differentiation
angles
tangents
division
median
trigonometry
integers
cube numbers
hexagons
even numbers
scales
binary
partitions
coins
quadratics
cubics
cards
star numbers
calculus
doubling
sum to infinity
people maths
digital products
consecutive integers
range
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