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