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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
Tags:
numbers
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Archive
Show me a random puzzle
▼ show ▼
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Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
spheres
crossnumbers
chocolate
mean
consecutive integers
square roots
sets
logic
powers
shape
3d shapes
albgebra
dominos
colouring
circles
bases
digital products
factorials
arrows
addition
cryptic crossnumbers
sum to infinity
quadrilaterals
means
neighbours
square numbers
grids
graphs
palindromes
digits
taxicab geometry
numbers grids
percentages
doubling
consecutive numbers
perimeter
multiplication
regular shapes
algebra
squares
scales
tangents
crosswords
cube numbers
sums
2d shapes
averages
advent
tiling
prime numbers
planes
numbers
floors
geometry
routes
balancing
differentiation
range
gerrymandering
area
determinants
odd numbers
multiples
cryptic clues
coordinates
irreducible numbers
products
square grids
triangle numbers
geometric mean
decahedra
even numbers
surds
books
games
binary
number
parabolas
trigonometry
expansions
rectangles
lines
unit fractions
shapes
tournaments
polygons
chess
money
chalkdust crossnumber
complex numbers
functions
sequences
integration
median
fractions
remainders
time
partitions
matrices
ellipses
pentagons
clocks
star numbers
the only crossnumber
pascal's triangle
quadratics
combinatorics
probability
elections
dates
polynomials
people maths
menace
triangles
digital clocks
hexagons
dice
division
rugby
calculus
dodecagons
wordplay
coins
integers
cards
sport
symmetry
geometric means
speed
christmas
perfect numbers
probabilty
axes
cubics
folding tube maps
medians
angles
ave
volume
factors
indices
proportion
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