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Advent calendar 2016
18 December
All 2016 advent puzzles
~
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The smallest number whose sum of digits is 25.
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Most recent collections
Advent calendar 2025
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List of all puzzles
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sport
cube numbers
logic
factors
crossnumbers
cryptic crossnumbers
partitions
digital clocks
grids
chess
calculus
neighbours
even numbers
percentages
2d shapes
unit fractions
shapes
products
expansions
sum to infinity
routes
algebra
coins
shape
people maths
xor
rugby
pascal's triangle
dates
speed
volume
medians
fractions
the only crossnumber
lines
planes
indices
regular shapes
lists
elections
surds
sequences
axes
sums
menace
arrows
geometry
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games
determinants
time
factorials
binary
star numbers
clocks
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geometric means
cryptic clues
coordinates
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perfect numbers
square grids
cubics
symmetry
triangle numbers
pentagons
consecutive numbers
proportion
squares
probability
money
spheres
means
tiling
doubling
integration
3d shapes
quadratics
ellipses
rectangles
geometric mean
tournaments
dodecagons
trigonometry
balancing
angles
folding tube maps
multiples
graphs
circles
wordplay
numbers
functions
integers
multiplication
scales
consecutive integers
irreducible numbers
bases
books
prime numbers
number
decahedra
multiplaction squares
median
addition
colouring
triangles
mean
powers
square numbers
differentiation
square roots
sets
remainders
odd numbers
combinatorics
tangents
chalkdust crossnumber
polygons
polynomials
taxicab geometry
chocolate
dominos
complex numbers
averages
crosswords
ave
division
area
matrices
gerrymandering
probabilty
cards
range
perimeter
christmas
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