Question

Observe the pattern given below

Then term at $n^{th}$ position will be given by expression

• A.
• B.
• C. $n\ast (n-1)$
• D.

Answer 1

The correct option is A

So $n^{th}$ term will be $\frac{n(n+1)}{2}$

Alternatively, eliminate the options to figure out the correct answer. This is a good method while attending competitive exams where time plays a crucial role.