Triangular numbers

Square numbers

Square numbers   

Square numbers

When a natural number is multiplied by itself number obtained as the answer is a square numbers.

       




                      1 x 1 =1        2 x 2 = 4       3 x 3 = 9     4 x 4 = 16    5 x 5 = 25

1st     => 1 x 1 = 1       =  1²                                                  2nd    => 2 x 2 = 4       =  2²                               

3rd     =>3 x 3 = 9        =  3² 

4th     => 4 x 4 = 16      =   4² 

5th     => 5 x 5 = 25      =   5²

n      => n x n  =          =    n²