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