What is the first ten triangle numbers?

Answer 1

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

Answer 2

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

Answer 3

The first ten triangle numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, and 55. Each triangle number is the sum of all positive integers up to that respective number.

Answer 4

By Greenskier xxx

The first 7 triangle numbers are :

1,3,6,10,15,21,28

Answer 5

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.

Answer 6

the first 10 triangle numbers are:

1, 3, 6, 10, 15, 21, 28, 36, 45, 55.

Answer 7

3,6,9,12,15,18,21,24,27,30

Answer 8

3,6,10,15,21,28,36,45,55