The answer would be 15 and 21. The triangular numbers are 1,3,6,10,15,21,28,36,45,55,66,78. 15 plus 21 is 36 which is on the list. 21 minus 15 is 6 and that is on the list as well.
1, 3, 6, 10, 15, 21, 28, 36
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.
6 and 10 are triangular numbers that make 16.
the answer is of course 12
The answer would be 15 and 21. The triangular numbers are 1,3,6,10,15,21,28,36,45,55,66,78. 15 plus 21 is 36 which is on the list. 21 minus 15 is 6 and that is on the list as well.
i have an idea can someone help?
No, because the list is infinite. However, you can find them for yourself since the nth triangular number is n(n+1)/2
List of triangular numbers 1,3,6,... work out the rest
None. There is nobody to whom triangular numbers belong.
1, 3, 6, 10, 15, 21, 28, 36
-1999
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.
6 and 10 are triangular numbers that make 16.
Nope Triangular numbers are 1,3,6,10,15,21,28,36
1,36,1225,41616,1413721
the answer is of course 12