This is the pattern of arrangement of squares.
There are 2 squares in the first step, then 2 squares added in every next step. Therefore number pattern is 2, 4, 6
This is the pattern of arrangement of squares.
There is 1 square in the first step, then 2 squares are added in every next step. Therefore number pattern is 1, 3, 5
This is the pattern of arrangement of triangles.
There is 1 triangle in the first step, then 3 triangles are added in every next step. Therefore number pattern is 1, 4, 7