Question

what is the succesor of the 5th triangular number​

Answer 1

Triangular number or triangle numbercounts objects arranged in an equilateral triangle. The nth triangular number is the number of dots in the triangular arrangement with n dots on a side, and is equal to the sum of the n natural numbers from 1 to n.

Answer 2

Answer:

16

Step-by-step explanation:

5th triangular no. = n(n+1)/2

                             = 5(5+1)/2 = (5*6)/2 = 30/2 = 15

successor of 15 = 15 + 1 = 16