Question

Observe the dot arranged in the triangle. dots will be there in the next triangle of series?

• A. 10
• B. 12
• C. 14
• D. 16

Answer 1

The correct option is A 10

We can observe that the number of dot in the triangular figure is as follows.

1, 3, 6 ....... and so on.

The first number is $1$

The second number is $1+2=3$

The third number is $1+2+3=6$

Similarly, the 4th number will be equal to

$1+2+3+4=10$

Hence, the next triangle will have 10 dots.