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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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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
dominos
geometry
triangle numbers
sums
dates
floors
quadrilaterals
averages
dodecagons
axes
chocolate
probability
tournaments
cube numbers
differentiation
advent
lists
consecutive numbers
triangles
integers
prime numbers
games
rectangles
speed
spheres
lines
crossnumbers
polynomials
cryptic clues
integration
products
bases
surds
factors
hexagons
the only crossnumber
palindromes
grids
graphs
sport
irreducible numbers
odd numbers
determinants
balancing
square grids
square roots
tangents
fractions
elections
regular shapes
clocks
rugby
median
digital clocks
xor
prime factors
albgebra
perimeter
books
folding tube maps
number
symmetry
doubling
square numbers
polygons
angles
pentagons
cryptic crossnumbers
volume
digits
range
people maths
star numbers
functions
sum to infinity
proportion
complex numbers
mean
factorials
parabolas
sequences
money
shapes
pascal's triangle
multiplication
dice
3d shapes
cubics
circles
chess
time
probabilty
planes
division
christmas
gerrymandering
multiplaction squares
numbers
digital products
means
consecutive integers
partitions
squares
ave
wordplay
decahedra
area
expansions
combinatorics
2d shapes
perfect numbers
routes
crosswords
quadratics
logic
cards
calculus
chalkdust crossnumber
algebra
coordinates
geometric means
taxicab geometry
even numbers
medians
colouring
powers
menace
ellipses
remainders
shape
unit fractions
neighbours
scales
geometric mean
binary
matrices
addition
indices
sets
coins
percentages
trigonometry
arrows
multiples
tiling
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