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