Write first 4 triangular numbers and verify that sum of two consecutive triangular numbers is a square number.

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

First four triangular numbers are: 1, 3, 6 and 10.

Now, 1 + 3 = 4 = 22

3 + 6 = 9 = 32

6 + 10 = 16 = 42

Here, 4, 9 and 16 all are square numbers.

Answered by  | 4th Jun, 2014, 03:23: PM