Question

11th triangular number is: *
110
66
121
None of these
​

Answer 1

Answer:

121 is the right answer

Answer 2

Step-by-step explanation:

0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120, 136, 153, 171, 190, 210, 231, 253, 276, 300, 325, 351, 378, 406, 435, 465, 496, 528, 561, 595, 630, 666