Which of the following is the sequence of triangular numbers?
A)1, 3, 6, 9, 12, ...
B)1, 3, 6, 10, 15, ...
C)3, 6, 9, 12, ...
D)3, 6, 10, 15, ...
E)3, 9, 27, 81, ...

Question

Quizplus · Accepted Answer

Triangular numbers are the sum of the natural numbers up to a given number. For example, the third triangular number is 1+2+3=6, and the sequence continues by adding the next natural number in the sequence. Option B correctly represents this sequence.

Which of the Following Is the Sequence of Triangular Numbers