Make triangular patterns with the help of the following number.

$15$

Which pattern resembles a circle$?$

Which pattern as seen in the mirror can be divided into two identical halves $?$

Make triangular patterns with the help of the following number.

$15$

Make triangular patterns with the help of the following number.

$21$

Make dotted patterns using square numbers $5\times 5=25$ and $6\times 6=36$.

Fill the numbers from $21$ to $29$ in such manner in the given box that sum of rows/columns is $75$.

Rule: The total of each line is $75$.

Fill the following hexagon in a such way that number comes in square must be multiplication of its adjoining two circles.

Fill the following hexagon in a such way that, number comes in square box must be multiplication of its adjoining two circles.

Note: Multiplication is the inverse process of division.