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