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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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numbers
bases
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arrows
chess
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crossnumber
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the only crossnumber
time
wordplay
doubling
books
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binary
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even numbers
balancing
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grids
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ave
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dice
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tiling
regular shapes
crosswords
games
speed
rectangles
neighbours
area
matrices
probability
cube numbers
triangle numbers
combinatorics
chocolate
medians
calculus
determinants
sets
powers
indices
prime numbers
sequences
pascal's triangle
perfect numbers
algebra
trigonometry
albgebra
functions
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mean
means
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coins
money
decahedra
complex numbers
angles
taxicab geometry
cryptic crossnumbers
lines
numbers grids
division
shape
logic
cubics
spheres
sum to infinity
palindromes
digital clocks
pentagons
integers
menace
quadrilaterals
christmas
rugby
range
consecutive integers
colouring
symmetry
hexagons
number
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dominos
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