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