The first six triangular numbers are : 1,3,6,10,15,21.
However, sometimes the first triangular number is regarded as 0 (zero) so you then have 0,1,3,6,10,15 as the first six triangular numbers.
Triangle numbers or triangular numbers are those numbers that can form an equilateral triangle when counting the objects. The first five triangular numbers are: 1, 3, 6, 10, 15.
If I remember correctly, the triangle numbers are 1, 3, 6, 10, 15... It is like racking up billiard balls or bowling pins. If the first number is 1, then the 3rd number is 6.
Triangluar numbers or triangle numbers are numbers formed from the summation of all the numbers smaller than them. The first few triangle numbers are 1,3,6,10,15,21... If you think of a pyramid with a base of two blocks, and one on top, there are three blocks. If you add a base of three to that pyramid, you have six blocks. Then ten, and fifteen and so on. That is why they are called Triangle numbers.
1.4.9.16.25.36
If you consider row 0 as the row consisting of the single 1, then row 100 has 6 odd numbers.
the first 10 triangle numbers are:1, 3, 6, 10, 15, 21, 28, 36, 45, 55.
The first two triangle numbers are 3 and 6. [Unless you start with 1 as the first.]
Triangle numbers or triangular numbers are those numbers that can form an equilateral triangle when counting the objects. The first five triangular numbers are: 1, 3, 6, 10, 15.
A triangle number is a number that can form an equilateral triangle with that amount of objects. The first ten triangle numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, and 55.
1, 3, 6, 10, 15, 21
By Greenskier xxx The first 7 triangle numbers are : 1,3,6,10,15,21,28
3,6,9,12,15,18,21,24,27,30
No.
Using 1-6 can a magic triangle have a sum of 13
If I remember correctly, the triangle numbers are 1, 3, 6, 10, 15... It is like racking up billiard balls or bowling pins. If the first number is 1, then the 3rd number is 6.
Because they can be arranged in triangles. Think of a set of bowling pins. 1 in front, 2 behind that, 3 behind that, 4 behind that 1, 3, 6 and 10 are the first four triangle numbers.
Yes. I think they're in the 3rd diagonal of the triangle. Basically, its how many numbers you need to make a geometrically correct triangle: 1, 3, 6, 10......