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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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rugby
geometry
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volume
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sequences
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triangles
square grids
even numbers
consecutive numbers
sport
triangle numbers
partitions
routes
area
expansions
surds
sum to infinity
quadratics
folding tube maps
sets
mean
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number
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parabolas
lines
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