P6 / River Valley / 2019 / SA2 / Paper 2 – Q17 [5 marks]

Question:

Bala uses shaded and unshaded squares to form figures that follow a pattern. The first three figures are shown below.
(a) The table below shows the number of unshaded square for each figure.
Complete the table for Figure 4 and Figure 5.
(b) What is the difference in the number of unshaded squares Bala uses for Figure 11 and Figure 14?
(c) Another figure in the pattern has 20 more unshaded than shaded squares. What is the total number of shaded and unshaded squares in that figure?