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Advent calendar 2017
8 December
All 2017 advent puzzles
~
More information
The odd numbers are written in a pyramid.
1
3
5
7
9
11
etc.
What is the mean of the numbers in the 23rd row?
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529
Tags:
numbers
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number
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elections
dominos
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ellipses
chocolate
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functions
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geometric mean
area
even numbers
tiling
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square numbers
proportion
menace
cards
crossnumbers
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geometry
mean
median
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floors
polygons
matrices
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consecutive integers
rugby
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Most recent collections
Advent calendar 2025
Advent calendar 2024
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List of all puzzles
Tags
time
addition
advent
regular shapes
irreducible numbers
games
arrows
clocks
floors
3d shapes
the only crossnumber
people maths
medians
range
averages
square roots
cryptic crossnumbers
mean
lines
quadratics
geometry
quadrilaterals
factorials
shape
hexagons
number
rugby
matrices
bases
dodecagons
digital clocks
elections
remainders
logic
powers
unit fractions
sum to infinity
prime numbers
routes
digital products
differentiation
menace
trigonometry
digits
taxicab geometry
surds
odd numbers
cube numbers
ellipses
colouring
pentagons
probability
albgebra
volume
star numbers
gerrymandering
expansions
spheres
parabolas
dominos
tangents
planes
grids
cubics
combinatorics
books
multiplaction squares
dates
axes
coordinates
cards
means
square grids
coins
complex numbers
prime factors
multiplication
chocolate
consecutive integers
scales
crosswords
integers
triangles
2d shapes
chess
algebra
shapes
squares
palindromes
consecutive numbers
lists
perfect numbers
sport
crossnumbers
fractions
graphs
indices
christmas
integration
money
percentages
even numbers
doubling
binary
neighbours
sums
xor
polynomials
geometric mean
ave
multiples
calculus
balancing
partitions
rectangles
sequences
cryptic clues
numbers
factors
products
geometric means
area
determinants
speed
folding tube maps
decahedra
proportion
triangle numbers
median
wordplay
chalkdust crossnumber
sets
square numbers
perimeter
tiling
angles
division
circles
functions
probabilty
dice
symmetry
tournaments
pascal's triangle
polygons
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