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Advent calendar 2023
17 December
All 2023 advent puzzles
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If you expand \((a+b+c)^2\), you get \(a^2+b^2+c^2+2ab+2ac+2bc\). This has 6 terms.
How many terms does the expansion of \((a+b+c+d+e+f)^5\) have?
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\((a+b+c+d+e+f)^5\) has
252
terms.
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List of all puzzles
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parabolas
odd numbers
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means
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sport
polygons
chocolate
irreducible numbers
crossnumber
rectangles
books
digital products
combinatorics
tiling
squares
division
cryptic crossnumbers
dodecagons
sum to infinity
doubling
triangle numbers
pentagons
multiplication
consecutive numbers
probabilty
addition
triangles
sets
expansions
proportion
multiples
christmas
unit fractions
shapes
hexagons
sums
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prime numbers
differentiation
fractions
quadratics
spheres
volume
indices
percentages
circles
determinants
quadrilaterals
consecutive integers
colouring
gerrymandering
arrows
sequences
dominos
crossnumbers
symmetry
floors
tangents
geometric mean
chess
cubics
advent
logic
scales
coins
surds
range
integers
digital clocks
money
graphs
planes
2d shapes
folding tube maps
binary
algebra
time
integration
the only crossnumber
polynomials
digits
palindromes
albgebra
ellipses
crosswords
shape
averages
taxicab geometry
geometry
games
coordinates
menace
cards
bases
geometric means
chalkdust crossnumber
regular shapes
people maths
elections
clocks
trigonometry
dice
rugby
square roots
factors
cryptic clues
axes
even numbers
mean
factorials
star numbers
calculus
speed
grids
angles
pascal's triangle
number
remainders
functions
3d shapes
median
dates
partitions
decahedra
tournaments
numbers
perimeter
lines
wordplay
products
cube numbers
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complex numbers
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