Question

in a stadium, the first row in a section has 9 seats. every successive row has 2 more seats. how many seats are there in the first 12 rows?

Answer 1

240 seats

Explanation:

As the number of seats increase by 2 per successive row it will be:

9

11

13

15

17

19

21

23

25

27

29

31

If you had all of these seats of 12 successive rows then the sum will be 240.