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
Triangle numbers are a series of sums of the first nnumbers.
Thus
T1 = 1
T2 = 1+2 = 3
T3 = 1+2+3 = 6
T4 = 1+2+3+4 = 10
However, rather than ading up a whole lot of numbers, it sis easy to prove that
Tn = n*(n+1)/2
By Greenskier xxx
The first 7 triangle numbers are :
1,3,6,10,15,21,28
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.
the first 10 triangle numbers are:
1, 3, 6, 10, 15, 21, 28, 36, 45, 55.
3,6,9,12,15,18,21,24,27,30
3,6,10,15,21,28,36,45,55
A triangle is a 3 sided shape. There are a few types, Isosceles, Scalene (Acute and Obtuse), Equilateral and the Right angle triangle.
The pH numbers refer to power of ten, so a change of 2 numbers means that the moles per liter of hydrogen ions has changed by 100.
Lithium
The sum of the first 100 positive even numbers is 10,100.
Runway numbers represent the orientation of the runway approach in compass degrees rounded to the nearest ten degrees.
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.
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.
2520 is the smallest multiple of of first ten natural numbers.
The first two triangle numbers are 3 and 6. [Unless you start with 1 as the first.]
Ordinary numbers
3.141592653
The average of the first ten prime numbers is 12.9.
The first ten positive numbers total 55.
The first ten happy numbers are: 1, 7, 10, 13, 19, 23, 28, 31, 32, 44
16,17,18,19,20,21,22,23,24,25.
thousands
38.5