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Advent calendar 2017
7 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 sum of the numbers in the seventh row?
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343
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numbers
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Archive
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Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
axes
time
rectangles
menace
multiplication
parabolas
surds
quadrilaterals
proportion
crossnumber
cube numbers
even numbers
taxicab geometry
dodecagons
pascal's triangle
trigonometry
unit fractions
albgebra
bases
addition
christmas
indices
multiples
squares
partitions
money
division
complex numbers
means
pentagons
speed
the only crossnumber
probabilty
combinatorics
advent
differentiation
decahedra
averages
grids
percentages
sequences
sum to infinity
coins
geometric means
shape
geometric mean
products
star numbers
chocolate
factors
colouring
dates
triangle numbers
mean
arrows
triangles
volume
odd numbers
calculus
chess
folding tube maps
clocks
regular shapes
sums
hexagons
doubling
binary
square roots
expansions
gerrymandering
area
median
palindromes
tiling
perfect numbers
polynomials
integers
coordinates
digital products
spheres
games
perimeter
range
shapes
factorials
books
elections
digital clocks
cards
circles
angles
dice
people maths
sets
consecutive integers
numbers
cubics
crosswords
scales
square numbers
logic
wordplay
determinants
geometry
2d shapes
ellipses
quadratics
integration
3d shapes
balancing
cryptic clues
prime numbers
matrices
chalkdust crossnumber
floors
algebra
fractions
polygons
routes
digits
symmetry
dominos
ave
sport
graphs
irreducible numbers
cryptic crossnumbers
tangents
number
remainders
tournaments
planes
crossnumbers
lines
probability
functions
consecutive numbers
rugby
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