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