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Advent calendar 2017
8 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 mean of the numbers in the 23rd row?
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529
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numbers
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the only crossnumber
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multiples
sequences
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dates
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logic
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combinatorics
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even numbers
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products
Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
digits
trigonometry
taxicab geometry
decahedra
complex numbers
averages
routes
unit fractions
determinants
perfect numbers
square roots
sum to infinity
remainders
sums
money
mean
ave
wordplay
bases
perimeter
3d shapes
consecutive integers
probability
pascal's triangle
the only crossnumber
gerrymandering
quadratics
multiples
fractions
proportion
spheres
prime numbers
tournaments
matrices
digital clocks
hexagons
games
integers
consecutive numbers
partitions
star numbers
rugby
division
symmetry
chocolate
grids
rectangles
functions
ellipses
polynomials
planes
pentagons
coins
axes
crossnumbers
percentages
multiplication
geometric mean
parabolas
albgebra
means
squares
shape
menace
scales
crossnumber
tiling
sequences
regular shapes
2d shapes
number
even numbers
triangle numbers
logic
square numbers
expansions
crosswords
arrows
probabilty
triangles
dodecagons
balancing
area
cards
palindromes
doubling
tangents
coordinates
books
addition
products
shapes
indices
combinatorics
factors
angles
graphs
cube numbers
sets
speed
surds
cryptic clues
clocks
geometry
irreducible numbers
quadrilaterals
chalkdust crossnumber
dates
median
range
circles
integration
differentiation
people maths
folding tube maps
digital products
chess
geometric means
polygons
elections
algebra
cryptic crossnumbers
time
calculus
numbers
christmas
floors
factorials
lines
colouring
sport
cubics
odd numbers
volume
dominos
advent
dice
binary
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