Level 2
Study the pattern.
13 -14 = 112
14 - 15 = 120
15 -16 = 130
What is the value of 129 - 130?
2 m
Level 3
Study the pattern. The figures are made up of black squares.
  1. How many black squares will there be in Figure 4?
  2. How many black squares will there be in Figure 10?
  3. Which figure is made up of 396 black squares?
4 m