Three numbers are chosen from the first $n$ natural numbers. What is the probability that they can be sides of a triangle?
98435
Probability that a triangle can be formed from a permutation of three edges of random length
111626
probability of three random points inside a circle forming a right angle triangle
43398
Find possible number of triangles with integer sides for a given inradius
43507
What is the probability that three heads occur before three tails?
94620
Which number was removed from the first $n$ naturals?
3341
Find $\sum_{r=1}^{3n-1}{ (-1)^{r-1}r\over{3n \choose r}}$, if $n$ is even
96737
Geometric proof that a Pythagorean triple has a number divisible by $3$?
56416
How do I generate number pattern in triangular form
148745
Determine if a number is the sum of two triangular numbers.
145905
What is the probability that a point chosen randomly from inside an equilateral triangle is closer to the center than to any of the edges?
114783
What is the probability that all three tosses result in the same outcome?
45027
number of primitive Pythagorean triangles whose hypotenuses do not exceed n?
69800
Construction of a right triangle
78702
Which triangular numbers are also squares?
62126
Constructing a triangle given 2 sides and the inscribed circle's radius
34452
In how many ways can you choose $k$ numbers out of $\{1,2,3,\dots,n\}$ so none of them is consecutive?
28942
About Math notation: the set of the first $n$ natural numbers