(a)[1]
Using the grid, draw Diagram 4.
(b)[1]
State the term to term rule for the number of grey squares.
(c)[6]
Fill in the table.
(d)[1]
Calculate the number of small white squares in Diagram 18.
(e)[2]
Find its Diagram number.
(f)[3]
Work out the total number of small squares in this diagram.