Question

In a theater there are 11 chairs in the first row, each row has 2 more than the previous row,and there are 12 rows. How many are there in the theater?

Answer 1

264 chairs

Explanation:

So we know that there are 11 chairs in each row and after that row, you keep adding 2 more chairs, so the ongoing equation can be 11 + 2, or 11 x 24. So, to do this the more easyier way instead of 11 x 24, create a column addition made of the rule (add 2) starting at 11, which is 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33. Hope this helps!