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Advent calendar 2017
21 December
All 2017 advent puzzles
~
More information
The factors of 6 (excluding 6 itself) are 1, 2 and 3. \(1+2+3=6\), so 6 is a
perfect number
.
Today's number is the only three digit perfect number.
Show answer
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496
Tags:
numbers
,
factors
,
perfect numbers
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Most recent collections
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
rectangles
consecutive numbers
probability
odd numbers
graphs
dominos
coordinates
colouring
2d shapes
consecutive integers
books
proportion
bases
median
functions
matrices
square numbers
numbers
polygons
shapes
number
cards
products
geometry
albgebra
geometric mean
mean
balancing
differentiation
quadratics
sport
games
factorials
crossnumbers
dodecagons
integration
tiling
averages
multiples
3d shapes
routes
chocolate
axes
combinatorics
wordplay
irreducible numbers
arrows
triangles
expansions
quadrilaterals
taxicab geometry
algebra
tangents
speed
grids
digits
factors
advent
cubics
geometric means
polynomials
percentages
scales
sums
addition
means
crossnumber
menace
remainders
elections
gerrymandering
regular shapes
tournaments
dice
money
floors
dates
division
sets
ellipses
surds
multiplication
sum to infinity
binary
time
integers
star numbers
cube numbers
perfect numbers
hexagons
people maths
symmetry
ave
volume
partitions
circles
area
cryptic clues
indices
unit fractions
clocks
palindromes
parabolas
christmas
shape
squares
folding tube maps
spheres
prime numbers
perimeter
crosswords
probabilty
trigonometry
chalkdust crossnumber
determinants
lines
decahedra
planes
triangle numbers
pascal's triangle
angles
logic
the only crossnumber
chess
range
fractions
digital products
sequences
rugby
doubling
cryptic crossnumbers
complex numbers
square roots
coins
even numbers
calculus
pentagons
digital clocks
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