Geometrical intuition for sum of first n cubes
15100
Proving the identity $\sum_{k=1}^n {k^3} = \big(\sum_{k=1}^n k\big)^2$ without induction
1627
Cartesian product of an arbitrary number of sets
129299
Fibonacci sequence and Euclidean algorithm's connection.
89501
Equidecomposability of a Cube into 6 Trirectangular Tetrahedra
44649
Summing a series having a geometric component
16168
Intuitive Bernoulli numbers
135914
Evaluate the sum of cubes
69194
Partitioning sum of squares
80229
How to prove this curiosity that has to do with cubes of certain numbers?
104309
Pigeon-Hole Principle Common Sum
93657
Proving “The sum of $n$ consecutive cubes is equal to the square of the sum of the first $n$ numbers.”
87431
$n-$circular arrangement problem
146581
The sum of the first $n$ squares $(1 + 4 + 9 + \cdots + n^2)$ is $\frac{n(n+1)(2n+1)}{6}$
25476
Question on geometrical proof of Geometric Series
107395
If the sum of $n$ cubes is zero, then the sum must be no larger than $\frac n3$.
20443
Calculate sum of squares of first $n$ odd numbers
128716
Intuitive/direct proof that a rectangle partitioned into rectangles each with at least one integer side must itself have an integer side