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Advent calendar 2015
8 December
All 2015 advent puzzles
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What is the largest number of factors which a number less than a million has?
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720720 has 240 factors.
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Most recent collections
Advent calendar 2019
Sunday Afternoon Maths LXVII
Coloured weights
Not Roman numerals
Advent calendar 2018
Sunday Afternoon Maths LXVI
Cryptic crossnumber #2
List of all puzzles
Tags
elections
chalkdust crossnumber
quadratics
unit fractions
doubling
star numbers
triangles
digital clocks
graphs
people maths
ave
products
3d shapes
addition
ellipses
perimeter
cryptic clues
median
rectangles
numbers
shapes
clocks
parabolas
planes
algebra
rugby
geometry
money
division
multiples
coins
trigonometry
proportion
square roots
averages
floors
crossnumbers
dates
dice
dominos
2d shapes
tiling
complex numbers
area
means
time
cryptic crossnumbers
shape
folding tube maps
speed
indices
spheres
menace
sums
perfect numbers
range
dodecagons
sequences
fractions
squares
cube numbers
hexagons
chess
prime numbers
differentiation
crosswords
integers
square numbers
colouring
scales
chocolate
routes
palindromes
odd numbers
number
symmetry
multiplication
percentages
probability
triangle numbers
calculus
bases
circles
digits
factors
wordplay
advent
probabilty
grids
books
remainders
partitions
regular shapes
angles
mean
balancing
gerrymandering
the only crossnumber
crossnumber
sport
coordinates
arrows
logic
taxicab geometry
factorials
cards
christmas
integration
surds
lines
pascal's triangle
sum to infinity
volume
irreducible numbers
games
polygons
functions
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