Math, asked by jayarajjay00, 4 months ago

1, 3, 6, 10, 15, 21, .... are triangular
numbers. The 15th triangular number
is

Answers

Answered by binayakdeb9864

7

Answer:

1, 3, 6, 10, 15, 21, .... are triangular

numbers. The 15th triangular number

is 120

Step-by-step explanation:

The triangular no. are 1,3,6,10,15,21,28,36,45,55,66,78,91,105,120....

So the 15th triangular no. is 120

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