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