. Find the sum of 9th and 10th triangular numbers.
Answers
Answered by
2
Sum of 9th and 10th triangular number is 100.
Step-by-step explanation:
We know,
9th triangular number = 45
10th triangular number = 55
Solve-
Sum of 9th and 10th triangular numbers
= 45 + 55
= 100
Answered by
0
Step-by-step explanation:
9th triangular no =45
10th triangular no =55
and their sum =45+55
=100
Similar questions