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Advent calendar 2019
24 December
All 2019 advent puzzles
~
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There are six 3-digit numbers with the property that the sum of their digits is equal to the product of their digits. Today's number is the largest of these numbers.
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The digits of the number must be 1, 2 and 3, so the largest number is
321
.
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square numbers
dodecagons
perimeter
grids
dominos
ellipses
doubling
integration
averages
median
remainders
odd numbers
surds
geometric means
geometry
symmetry
planes
bases
prime factors
chocolate
taxicab geometry
prime numbers
range
logic
star numbers
advent
binary
sport
pentagons
circles
powers
decahedra
coins
clocks
quadrilaterals
dates
lines
products
triangle numbers
hexagons
polygons
albgebra
shape
digits
pascal's triangle
crosswords
elections
digital products
percentages
tournaments
fractions
floors
consecutive numbers
parabolas
factorials
balancing
matrices
even numbers
people maths
games
coordinates
folding tube maps
tiling
cards
cube numbers
differentiation
irreducible numbers
means
axes
scales
volume
calculus
medians
multiplication
sums
wordplay
number
combinatorics
chess
money
partitions
tangents
functions
probabilty
multiplaction squares
triangles
dice
digital clocks
arrows
crossnumbers
polynomials
unit fractions
2d shapes
spheres
routes
addition
gerrymandering
numbers
graphs
multiples
time
algebra
mean
area
indices
quadratics
regular shapes
christmas
the only crossnumber
speed
rugby
proportion
probability
ave
rectangles
angles
chalkdust crossnumber
consecutive integers
complex numbers
sum to infinity
shapes
geometric mean
books
xor
integers
square grids
menace
neighbours
perfect numbers
lists
cryptic crossnumbers
colouring
squares
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factors
square roots
cubics
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division
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