Which is true for a hexagonal pyramid?

Sequence the following tasks as they would be taken up while developing the understanding of shapes and space across primary classes;

A. Matches the properties of 2D shapes by observing their sides and corners.

B. Describes the intuitively the properties of 2D shapes.

C. Sorts 2D shapes. 

D. Describes the various 2D shapes by counting their sides, corners and diagonals.

Examine the following matchsticks patterns;

If the pattern comtinues, how many matchsticks are needed in the $15$th stage?

If an operator $\oplus$is defined as;

$4\oplus 3=4+5+6$

Then, what is the value of $n\oplus 8$?

The solid as shown in figure is made up of cubical blocks each of side $1$$cm$. The number of blocks is;

Look at the following pattern

$\left(9-1\right)÷8=1$

$\left(98-2\right)÷8=12$

$\left(987-3\right)÷8=123$

$\left(9876-4\right)÷8=1234$

According to this pattern, $\left(987654-6\right)÷8$ is;

Find the number of triangles in the given figure.