Try another version of this question

Determine the seating capacity of an auditorium with 10 rows of seats
if there are 20 seats in the first row, 23 seats in the second row,
26 seats in the third row, 29 seats in the forth row, and so on.

Total number of seats =

Total number of seats =

Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)

Enter DNE for Does Not Exist, oo for Infinity

335