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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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chalkdust crossnumber
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ave
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doubling
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means
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crossnumbers
pascal's triangle
irreducible numbers
rectangles
sums
taxicab geometry
bases
prime numbers
menace
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crossnumber
elections
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Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
tournaments
cryptic clues
taxicab geometry
chocolate
sets
coordinates
clocks
star numbers
balancing
probabilty
angles
medians
sport
axes
triangles
irreducible numbers
division
logic
complex numbers
money
quadratics
symmetry
crosswords
spheres
books
grids
games
median
routes
trigonometry
remainders
digital products
advent
2d shapes
unit fractions
3d shapes
means
proportion
decahedra
algebra
surds
lines
shape
polynomials
square grids
partitions
crossnumbers
digits
cubics
hexagons
area
albgebra
products
scales
tangents
christmas
doubling
colouring
factors
mean
sum to infinity
coins
triangle numbers
geometric mean
tiling
polygons
wordplay
combinatorics
geometry
square roots
people maths
bases
graphs
cards
circles
palindromes
probability
integers
folding tube maps
dominos
squares
dates
powers
cryptic crossnumbers
functions
expansions
factorials
number
averages
even numbers
speed
chess
shapes
regular shapes
calculus
dice
pascal's triangle
consecutive numbers
arrows
ave
parabolas
volume
quadrilaterals
fractions
odd numbers
percentages
neighbours
addition
integration
the only crossnumber
menace
ellipses
numbers
time
dodecagons
range
pentagons
chalkdust crossnumber
differentiation
geometric means
multiples
numbers grids
gerrymandering
determinants
multiplication
binary
sequences
digital clocks
indices
perfect numbers
rectangles
consecutive integers
crossnumber
floors
cube numbers
elections
perimeter
sums
matrices
rugby
prime numbers
planes
square numbers
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