Study the table carefully.
- How many dots are there in Figure 7?
- How many dots are there in Figure 10?
- If there are 121 dots, what is the figure number?
(a)
Pattern for the number of dots
Figure 1: 1 = 1 x 1
Figure 2: 4 = 2 x 2
Figure 3: 9
= 3 x 3
Figure 4: 16 = 4 x 4
Formula:
Number of dots = Figure number x Figure number
Number of dots in Figure 7
= 7 x 7
= 49
(b)
Number of dots in Figure 10
= 10 x 10
= 100
(c)
11 x 11 = 121
Figure number with 121 dots = 11
Answer(s): (a) 49; (b) 100; (c) 11