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