Square root and sum of odd numbers
71736
I found this odd relationship, $x^2 = \sum_\limits{k = 0}^{x-1} (2k + 1)$.
119381
Sum of even numbers errors
98294
Can decimal numbers be considered "even" or "odd"?
147562
Sum of squares diophantine equation
55582
How can I show that $\sqrt{1+\sqrt{2+\sqrt{3+\sqrt\ldots}}}$ exists?
66364
Why is $(\sqrt{2}+\sqrt{3})^{2008}$ so close to an integer?
123267
Proving that even numbers equal the sum of two odd numbers.
75723
Odd Binomial Coefficients?
67332
Sum of two squares modulo p
83145
Sum of rational numbers
7898
Finding square root without using sqrt function?
137109
Evaluating a summation of inverse squares over odd indices
137695
How to calculate square root or cube root?
17886
Values of square roots
15403
Sum of square of function
58171
Two problems about Squarefree numbers
101052
Find the infinite sum $\sum_{k=1}^{\infty}\sqrt k - 2\sqrt {k + 1} + \sqrt {k + 2} $