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.
1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.
8,9,5,7,2 and 1
It is 46.
Oh, dude, triangular numbers are like the cool kids of math, they're all about those equilateral vibes. So, between 11 and 39, we've got 15 and 21 as triangular numbers. That's it, just those two. It's like a tiny exclusive club, you know?
no No it is not. The first 5 triangular numbers are: 1, 3, 6, 10, 15
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.
1, 3, 6, 10, 15
The sum of the first n cubed numbers is the square of the nth triangular number.
triangular numbers are created when all numbers are added for example: To find the 5 triangular number (1+2+3+4+5).
the numbers betwenn 1 and 365222
1+1+1+1+1+=5 * * * * * The question did not ask for the sum of the first counting number five times! The sum of the first 5 counting numbers is 1+2+3+4+5 = 15. Such sums are known as triangular numbers.
8,9,5,7,2 and 1
It is 46.
Because it is ! The first 10 triangular numbers are... 1,3,6,10,15,21,28,36,45 & 55
The first twelve triangular numbers are: 1 3 6 10 15 21 28 36 45 55 66 78
The first two triangle numbers are 3 and 6. [Unless you start with 1 as the first.]