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