Q: What are the first 6 triangle numbers?

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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

Triangular numbers are numbers that are formed from the sum 1+2+3+4... The equation for the nth triangle number is (n2+n)/2 In this case, we want the sixth triangle number, so feed this into the equation: (62+6)/2 =(36+6)/2 =42/2 =21 Thus the sixth triangle number is 21.

Related questions

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.

The first two triangle numbers are 3 and 6. [Unless you start with 1 as the first.]

1, 3, 6, 10, 15, 21

Depending upon the definition used, the first 10 natural numbers are either: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or (first appearing in the 19th century): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Using 1-6 can a magic triangle have a sum of 13

No.

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......

Triangular numbers have no other name except "triangle numbers."They represent numbers of objects that can be arranged as equilateral triangles with side n.The number of objects required is defined by the formula T = n (n+1)/2 where successive rows will have from 1 to n objects.The first 6 triangle numbers are 1, 3, 6, 10, 15, and 21.

1 6 15 20 15 6 1

Because it can be arranged in a triangle. Think of a set of bowling pins. 1 followed by 2 followed by 3 followed by 4 1, 3, 6 and 10 (the totals including each row) are the first four triangle numbers.