Rows of chairs are set out for a wedding. There are 6 chairs in the first row, 14 chairs in the second row, and 22 chairs in the third row. The rows continue in the same pattern for a total of 7 rows. How many chairs are set out for the wedding guest?

First, you want to figure out the pattern of the rows of chairs. Clearly, here the pattern is to add 7 to the previous number.

Now, you want to continue the pattern 4 more times

6,14,22,_,_,_,_

6,14,22,29,36,43,50

Now you add all these numbers together to get the answer.

6 + 14 + 22 + 29 + 36 + 43 + 50 = ?

6 + 14 + 22 + 29 + 36 + 43 + 50 = 200

There are 200 chairs set out for the wedding guests.