Question

Observe the dot pattern arranged in triangles. How many dots will be there in the next triangle?

Answer 1

We can observe that the number of dots in the triangular figures is as follows.

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

First one has only $1$.

Second figure has $1+2=3$.

Third figure has $1+2+3=6$.

Similarly, fourth figure will have

$1+2+3+4=10$.

Hence, the next triangle will have 10 dots.