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Advent calendar 2017
21 December
All 2017 advent puzzles
~
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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.
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496
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regular shapes
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addition
triangles
lists
parabolas
menace
axes
surds
pentagons
bases
star numbers
triangle numbers
polynomials
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pascal's triangle
means
people maths
crossnumbers
sets
geometric mean
averages
grids
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rugby
chocolate
time
2d shapes
integers
complex numbers
dice
dodecagons
balancing
number
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digital products
factorials
money
routes
sum to infinity
cubics
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powers
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odd numbers
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