Question

Determine the number of squares in the following shapes:

Answer 1

Explanation:

5,10,15,20,...

Pattern description:

T1= 5

d=10-5=5

Tn = T1+(n-1)d

Tn = 5 + (n-1)(5)

= 5+5n-5

= 5n

so, Tn = 5n

Next 2 terms : 25, 30