Question

Observe the pattern given below.

What is the general expression for this pattern?

• A. $\frac{n(n+1)}{2}$
• B. $\frac{n(n-1)}{2}$
• C. $n\ast (n-1)$
• D. $n^2$

Answer 1

The correct option is A

$\frac{n(n+1)}{2}$

So the general expression for this pattern is $\frac{n(n+1)}{2}$, where n is the next term and n = 1, 2, 3, 4....

[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.]