There are 25 rows of seats in an auditorium. The 1st row is of 20 seats , the 2nd row of 22 seats , the 3rd row of 24 seats and so on. How many seats are there in the 21st row ?

A meeting hall has 30 rows in all. There are 20 seats in the first row, 24 seats in the second row and 28 seats in the third row and so on. How many seats are there in the hall? a) 136 b) 4640 c) 2340 d) 192

A meeting hall has 20 seats in the first row, 24 seats in the second row, 28 seats in the third row and so on and has in all 30 rows. How many seats are there in the meeting hall?

There is an auditorium with 27 rows of seats. There are 20 seats in the first row, 22 seats in the second row, 24 seats in the third row and so on. Find the number of seats in 15th row and the total seats in the auditorium.

There is an auditorium with 35 rows of seats. There are 20 seats in the first row, 22 seats in the second row, 24 seats in the third row and so on. Find the number of seats in the twenty second row .

In a flower bed, there are 23 rose plants in the first row, 21 in the second, 19 in the third, and so on. There are 5 rose plants in the last row. How many rows are there in the flower bed?

How many rows are there in a 3- input gate truth table?

There are 12 seats in a mini bus and 8 persons are to be seated in it. In how many ways can they be seated?

200 logs of wood are stacked in the following manner:20 logs in the bottom row,19 in the next row,18 in the row next to it and so on.In how many rows 200 logs are placed and how many logs are there in the top row?

On the World Environment Day tree plantation programme was arranged on a land which is triangular in shape. Trees are planted such that in the first row there is one tree, in the second row there are two trees, in the third row there are three trees and so on. Then find the total number of trees in 25 rows.