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Advent calendar 2016
2 December
All 2016 advent puzzles
~
More information
What is the maximum number of lines that can be formed by the intersection of 30 planes?
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435
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lines
,
planes
,
geometry
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
coins
squares
indices
percentages
triangle numbers
probabilty
digital products
dominos
regular shapes
combinatorics
proportion
volume
pascal's triangle
routes
expansions
sums
sport
cards
grids
cryptic crossnumbers
factorials
factors
people maths
star numbers
the only crossnumber
geometric mean
fractions
averages
parabolas
probability
speed
medians
menace
integers
dodecagons
consecutive numbers
3d shapes
rectangles
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even numbers
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colouring
tiling
arrows
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books
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wordplay
rugby
spheres
scales
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crossnumbers
taxicab geometry
balancing
perimeter
numbers
clocks
quadratics
shape
prime numbers
elections
sets
products
bases
surds
axes
square grids
irreducible numbers
crosswords
polygons
median
neighbours
square roots
multiples
symmetry
chalkdust crossnumber
complex numbers
shapes
coordinates
partitions
algebra
functions
differentiation
gerrymandering
chess
multiplaction squares
lists
angles
advent
dates
albgebra
digits
games
prime factors
area
consecutive integers
hexagons
palindromes
matrices
tournaments
square numbers
number
triangles
2d shapes
dice
geometric means
odd numbers
sum to infinity
calculus
xor
graphs
pentagons
integration
cryptic clues
ellipses
multiplication
folding tube maps
cubics
powers
decahedra
trigonometry
ave
christmas
binary
mean
unit fractions
determinants
money
time
doubling
geometry
sequences
digital clocks
division
remainders
floors
range
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