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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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planes
2d shapes
shape
consecutive integers
star numbers
polygons
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perfect numbers
factorials
trigonometry
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division
geometric means
factors
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volume
geometric mean
people maths
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lines
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sums
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