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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
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numbers
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Archive
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▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
angles
crosswords
rectangles
averages
3d shapes
consecutive integers
shape
advent
geometry
lines
remainders
square roots
logic
cryptic clues
mean
tournaments
sets
range
menace
fractions
folding tube maps
decahedra
circles
factors
functions
addition
digits
bases
square numbers
sport
polynomials
geometric mean
cryptic crossnumbers
arrows
factorials
crossnumbers
shapes
time
sums
the only crossnumber
axes
triangle numbers
star numbers
irreducible numbers
area
parabolas
digital products
calculus
albgebra
surds
symmetry
dodecagons
2d shapes
volume
chess
multiples
balancing
rugby
expansions
dice
percentages
elections
integration
median
combinatorics
dominos
geometric means
chalkdust crossnumber
graphs
even numbers
crossnumber
spheres
regular shapes
digital clocks
number
money
algebra
consecutive numbers
taxicab geometry
clocks
matrices
binary
proportion
cards
ave
cube numbers
coordinates
pentagons
cubics
differentiation
chocolate
games
numbers
division
polygons
people maths
gerrymandering
colouring
partitions
sequences
coins
tangents
unit fractions
perimeter
probabilty
christmas
doubling
dates
quadrilaterals
planes
hexagons
products
pascal's triangle
scales
probability
books
routes
perfect numbers
speed
wordplay
sum to infinity
triangles
palindromes
indices
odd numbers
complex numbers
trigonometry
floors
determinants
tiling
quadratics
multiplication
prime numbers
grids
squares
integers
means
ellipses
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