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This is the sequence of triangular numbers. You draw one dot. Then you draw two dots in the line below - one to the left and one to the right of the first dot. You now have a triangle, of three dots. Then you draw three dots in the next line and you get a triangle with 6 dots. Next, four more dots in the next line giving a triangle with 10 dots. The name is easy to understand if you can visualise or even actually draw these dots. It is difficult to demonstrate through an ordinary word processing package.
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What number comes next in sequence 1 3 6 10 15 21 28?
35
The sequence name for 1 1 2 3 5 8 13 21?
Fibonacci Sequence
What is this sequence called 1 3 5 7 9 11 13 15?
They are a sequence of odd numbers. The next three in the sequence would be 17,19 & 21
The first 6 triangular numbers are?
1, 3, 6, 10, 15 ,21 The nth term for the sequence (where you replace n with the term you want to find) is: (n(n+1))/2
What are two ratios that are equivilent to 5 over 7?
5:7 (or 5/7) is equivalent to 10:14 (10/14) and 15:21 (15/21).
